Fix `probes=None` server incompatibility (#3543)

This fixes server compatibility with clients prior
to 0.20.8 that don't support `probes=None`, by
replacing `None` with `[]` in responses for older
clients. This incompatibility could be observed
when there are both new and old clients in the
same project, so old clients would fail when
viewing runs submitted by new clients.

Fix scaling during update to replica groups (#3510)

This fix prevents the number of replicas from
dropping to `replicas.min` for all existing
services during a server update to 0.20.7.

Hotfix. Fixed generation fleet fields in project forms (#3486)

Add missing Box imports (#3485)

[UI] Minor re-order in the sidebar (#3484)

[Feature] Allow to see JSON state of runs/volumes/fleets/gateways via…

… CLI/UI (#3445)

* [Feature] Added `dstack inspect` CLI command

* [Feature] Add `Inspect` tab to the run and fleet pages

* PR review feedback.

Replaced `dstack inspect run|fleet|volume|gateway` with seprate commands `datack run|fleet|volume|gateway list --json`.

* PR review: `dstack run|fleet get --json`

Updated how UUID format errors are handled

* PR review: `dstack run|fleet get --json`

Better handling edge case (empty ID)

Make no fleet notifications dismissible (#3439)

Revert "No fleets notification #373 (#3418)" (#3424)

This reverts commit 0644871.

Relax event message validation rules (#3394)

Replace some message validation rules with
implicit message transformations. Some event
messages may include extracts from external
sources (e.g., external error messages), that do
not pass the validation rules. Such cases may be
difficult to find during development, and we do
not want them to break dstack in production.

[Verda] Rename the `datacrunch` backend to `verda` (#3359)