fix(ai): coerce query_workspace limit to int (str limit crashed the backend)

[ocervell]

Bug

🟢Query({'_type': 'ip', 'host': 'cachyos.local'}) -> failed results (limit: 10)
[ERR] ai TypeError: '>=' not supported between instances of 'int' and 'str'
  File ".../query/json.py", line 182, in _execute_search
    if limit and len(matched) >= limit:

The model sent query_workspace's limit as a string ("10"); it reached the backend and broke the >= comparison. Same "model stringifies args" class as #1275, but coerce_stringified_args only handles object/array params — not scalar ints like limit.

Fix

Coerce limit to int in _handle_query; bad/None values fall back to the default (100).

Tests

Stringified "10" → 10 reaches the backend; a non-numeric limit falls back to 100. test_ai_actions.py 99 passed; the original crash reproduces as resolved.

Targets ai-resiliency (#1241).

🤖 Generated with Claude Code

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