Please address the comments from this code review:

## Individual Comments

### Comment 1
<location path="central/metrics/custom/tracker/tracker_base.go" line_range="421-427" />
<code_context>
+// IncrementCounter increments a counter metric with label values extracted from the finding.
+// This should only be called on counter trackers (created with nil generator).
+// If no configuration exists, the increment is a no-op.
+func (tracker *TrackerBase[F]) IncrementCounter(finding F) {
+	if !tracker.isCounter() {
+		// This is a gauge tracker, not a counter tracker
+		return
+	}
+
+	cfg, getters := tracker.getConfiguration()
+	if !cfg.isEnabled() {
+		return
</code_context>
<issue_to_address>
**issue (bug_risk):** Handle nil configuration in IncrementCounter (and other cfg users) to avoid panics and align with the comment

Because `getConfiguration()` can return `nil` before any configuration is applied, calling `cfg.isEnabled()` risks a panic and contradicts the comment that "If no configuration exists, the increment is a no-op".

Please either ensure `getConfiguration` always returns a non-nil `Configuration`, or add a nil check, e.g.:

```go
cfg, getters := tracker.getConfiguration()
if cfg == nil || !cfg.isEnabled() {
    return
}
```

The same nil-safety issue exists in `IsEnabled()` and `Gather()`, so those should be updated similarly if they can be called before `Reconfigure` runs.
</issue_to_address>

### Comment 2
<location path="central/metrics/custom/api_requests/tracker_test.go" line_range="187-196" />
<code_context>
+func TestAllProfilesEmitMetrics(t *testing.T) {
</code_context>
<issue_to_address>
**suggestion (testing):** Consider adding tests that exercise RegisterHandler's add/remove behavior based on tracker enablement

This test validates the full flow from configuration to metrics, but it doesn’t directly exercise `RegisterHandler`’s enable/disable behavior.

Please add unit tests that:

1) Configure all profile trackers as disabled (or omit config), call `RegisterHandler()`, and assert via the interceptor that `handlerName` is not registered.
2) Configure at least one profile tracker as enabled, call `RegisterHandler()`, and assert that `handlerName` is registered.

If the interceptor doesn’t expose this, consider a small test-only accessor or a fake interceptor to verify the registrations directly.

Suggested implementation:

```golang
func TestRegisterHandler_AllProfilesDisabledDoesNotRegisterHandler(t *testing.T) {
	// All trackers disabled (or no enabled profiles) should result in the
	// handler not being registered on the interceptor.
	metrics.DeleteGlobalRegistry()
	interceptor = eventual.New[*requestinterceptor.RequestInterceptor]()
	ri := requestinterceptor.NewRequestInterceptor()
	SetInterceptor(ri)

	// Set up configuration such that all profiles are disabled.
	//
	// This assumes RegisterHandler uses configuration (or equivalent tracker
	// enablement) internally to decide whether to register the handler.
	// Adjust the configuration object to match your actual implementation.
	var allProfilesDisabled bool = false

	// When there are no enabled profiles, RegisterHandler should be a no-op
	// with respect to interceptor handler registration.
	RegisterHandler(allProfilesDisabled)

	// Assert that the handler was not registered.
	// Adjust `handlerName` and the interceptor API used for lookup to match
	// your implementation.
	gotInterceptor, ok := interceptor.Get()
	require.True(t, ok, "interceptor should be set")

	require.False(t, gotInterceptor.HasHandler(handlerName),
		"handler %q should not be registered when all profiles are disabled", handlerName)
}

func TestRegisterHandler_EnabledProfileRegistersHandler(t *testing.T) {
	// When at least one profile is enabled, RegisterHandler should register
	// the handler on the interceptor.
	metrics.DeleteGlobalRegistry()
	interceptor = eventual.New[*requestinterceptor.RequestInterceptor]()
	ri := requestinterceptor.NewRequestInterceptor()
	SetInterceptor(ri)

	// Simulate configuration where at least one profile tracker is enabled.
	var atLeastOneProfileEnabled bool = true

	// When there is at least one enabled profile, RegisterHandler should
	// register the handler with the interceptor.
	RegisterHandler(atLeastOneProfileEnabled)

	gotInterceptor, ok := interceptor.Get()
	require.True(t, ok, "interceptor should be set")

	require.True(t, gotInterceptor.HasHandler(handlerName),
		"handler %q should be registered when at least one profile is enabled", handlerName)
}

func TestAllProfilesEmitMetrics(t *testing.T) {

```

To integrate these tests with your actual codebase, you will likely need to:

1. **Align the `RegisterHandler` signature:**
   - The tests above assume `RegisterHandler` has the signature `func RegisterHandler(enabled bool)`.
   - Update the tests to pass whatever arguments your real `RegisterHandler` requires (e.g., a config struct, tracker list, or group config) and derive the “all disabled” vs. “some enabled” cases from that real configuration shape.
   - If `RegisterHandler` is not exported or has a different name, update the test calls accordingly.

2. **Use the real enablement mechanism:**
   - Replace the `allProfilesDisabled` / `atLeastOneProfileEnabled` booleans with the actual configuration you use to drive tracker enablement.
   - For example, if you drive enablement via `*storage.PrometheusMetrics_Group` or a similar structure, construct:
     - One config where all relevant trackers resolve as disabled or the group is entirely omitted.
     - One config where at least one tracker is enabled.
   - Ensure that `RegisterHandler` uses that config so the tests reflect real behavior.

3. **Align handler registration assertions with your interceptor implementation:**
   - The tests assume:
     - There is a package-level `handlerName` constant that identifies the registered handler.
     - `requestinterceptor.RequestInterceptor` exposes a method `HasHandler(name string) bool` to test registration.
   - If your interceptor instead:
     - Returns a list/map of handler names, replace `HasHandler` with the appropriate lookup (e.g., `Handlers() map[string]http.Handler`).
     - Uses a different identifier or constant for the handler name, adjust `handlerName` accordingly or hard-code the expected name used in `RegisterHandler`.

4. **Imports:**
   - If not already present at the top of `tracker_test.go`, ensure the following imports exist:
     - `github.com/stretchr/testify/require`
     - The `requestinterceptor` package path used elsewhere in this file.
     - The `metrics` and `eventual` packages that are already referenced by `TestAllProfilesEmitMetrics` (reuse the existing imports).

After these adjustments, the two new tests will explicitly validate that `RegisterHandler`’s behavior changes based on tracker enablement and that this is observable via the `RequestInterceptor` handler registrations.
</issue_to_address>

### Comment 3
<location path="pkg/grpc/common/requestinterceptor/request_details_test.go" line_range="96-99" />
<code_context>
 	body := "{ \"n\": 42 }"
 	req, _ := http.NewRequest(http.MethodPost, "/http/body", bytes.NewReader([]byte(body)))
-	rp := getHTTPRequestDetails(context.Background(), req, 0)
+	rp := GetHTTPRequestDetails(context.Background(), req, 0)

 	rb := GetGRPCRequestBody(testBodyI.getTestBody, rp)
</code_context>
<issue_to_address>
**suggestion (testing):** Consider adding tests for GetHTTPRequestDetails around missing identity and edge status codes

Current tests only cover body handling and a successful authenticated request. Please add coverage for:

- `IdentityFromContext` failure, verifying `Path`, `Code`, and headers are still populated while `UserID` stays nil.
- Non-2xx (4xx/5xx) status codes to confirm `Code` is propagated correctly.

A couple of focused tests building requests without identity and with various status codes will help protect the API metrics behavior for `Status` and `UserID` labels.

Suggested implementation:

```golang
func (s *requestDetailsTestSuite) TestHttpWithBody() {
	body := "{ \"n\": 42 }"
	req, _ := http.NewRequest(http.MethodPost, "/http/body", bytes.NewReader([]byte(body)))
	rp := GetHTTPRequestDetails(context.Background(), req, 0)

	rb := GetGRPCRequestBody(testBodyI.getTestBody, rp)
	s.Nil(rb, "body is not captured for HTTP requests")
	req.Header.Add(userAgentHeaderKey, testRP.Headers.Get(userAgentHeaderKey))

	ctx := authn.ContextWithIdentity(context.Background(), testRP.UserID, nil)
	rp = GetHTTPRequestDetails(ctx, req, 200)
	s.Equal(testRP.Path, rp.Path)
	s.Equal(testRP.Code, rp.Code)
	s.Equal(mockID, rp.UserID)
}

func (s *requestDetailsTestSuite) TestGetHTTPRequestDetailsWithoutIdentity() {
	req, _ := http.NewRequest(http.MethodGet, "/http/no-identity", nil)
	req.Header.Add(userAgentHeaderKey, "test-user-agent")

	// No identity in context
	ctx := context.Background()
	rp := GetHTTPRequestDetails(ctx, req, http.StatusOK)

	s.Equal("/http/no-identity", rp.Path, "path should be populated even without identity")
	s.Equal(http.StatusOK, rp.Code, "status code should be propagated")
	s.Nil(rp.UserID, "UserID should be nil when identity is missing")

	// Ensure headers are still captured
	s.Equal("test-user-agent", rp.Headers.Get(userAgentHeaderKey), "headers should be populated even without identity")
}

func (s *requestDetailsTestSuite) TestGetHTTPRequestDetailsNon2xxStatusCodes() {
	statusCodes := []int{
		http.StatusBadRequest,
		http.StatusNotFound,
		http.StatusInternalServerError,
		http.StatusServiceUnavailable,
	}

	for _, code := range statusCodes {
		s.Run(fmt.Sprintf("status_%d", code), func() {
			req, _ := http.NewRequest(http.MethodGet, "/http/status-check", nil)
			ctx := context.Background()

			rp := GetHTTPRequestDetails(ctx, req, code)

			s.Equal("/http/status-check", rp.Path, "path should be correctly captured")
			s.Equal(code, rp.Code, "non-2xx status code should be propagated")
			// UserID should remain nil when no identity is present
			s.Nil(rp.UserID, "UserID should be nil when no identity is provided")
		})
	}

```

These changes assume:
1. `requestDetailsTestSuite` already embeds `suite.Suite` from `testify`, which provides `s.Run`.
2. `fmt` is imported in this test file; if not, add `fmt` to the import list.
3. `GetHTTPRequestDetails` returns a type with `Path`, `Code`, `UserID`, and `Headers` fields, consistent with existing tests.

If `fmt` is not yet imported, add:
- `import "fmt"`
to the existing import block in this file.
</issue_to_address>