fix(analyzers): classify SQL tools separately from file-access tools (#165)

[hello-args]

Summary

• Add shared tool_classification module used by tool_abuse and path_validation
• Stop flagging SQL tools such as read_query for path traversal when schema/name indicate database access
• Keep HIGH findings for genuine file-access tools with path parameters

Test plan

• pytest tests/test_tool_classification.py
• read_query with SQL schema → no tool_abuse/path_validation findings
• read_file with path schema → still flagged

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