Description

codegraph_find_code with fuzzy_search=true and edit_distance=2 returns zero results for queries that differ by just 1 character from an existing function name.

Steps to Reproduce

pip install codegraphcontext==0.3.1
cgc index /path/to/project  # project contains a function named "autoIndex"

Then via MCP:

# Exact search works:
codegraph_find_code(query="autoIndex")
# → returns autoIndex function correctly

# Fuzzy search fails:
codegraph_find_code(query="autoIndx", fuzzy_search=true, edit_distance=2)
# → returns 0 results

Expected Behavior

Fuzzy search with edit_distance=2 should find autoIndex when querying autoIndx (edit distance = 1, well within threshold).

Actual Behavior

{
  "query": "autoindx",
  "functions_by_name": [],
  "classes_by_name": [],
  "variables_by_name": [],
  "content_matches": [],
  "ranked_results": [],
  "total_matches": 0
}

Note: the query is lowercased to autoindx in the response, suggesting the fuzzy search may be operating on a lowercased version while the index stores original case — potentially causing the mismatch.

Environment

• codegraphcontext: 0.3.1
• Database backend: KùzuDB (default)
• Python: 3.12.3
• OS: Linux (Ubuntu)