fix: address CodeRabbit review — convert to PreToolUse, add type annotations, logging

Critical fixes:
- Convert hook from PostToolUse to PreToolUse so exit(2) blocking works
- Change all python references to python3 for cross-platform compat
- Add insaits-security-wrapper.js to bridge run-with-flags.js to Python

Standard fixes:
- Wrap hook with run-with-flags.js so users can disable via
  ECC_DISABLED_HOOKS="pre:insaits-security"
- Add "async": true to hooks.json entry
- Add type annotations to all function signatures (Dict, List, Tuple, Any)
- Replace all print() statements with logging module (stderr)
- Fix silent OSError swallow in write_audit — now logs warning
- Remove os.environ.setdefault('INSAITS_DEV_MODE') — pass dev_mode=True
  through monitor constructor instead
- Update hooks/README.md: moved to PreToolUse table, "detects" not
  "catches", clarify blocking vs non-blocking behavior

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

mcp-configs/mcp-servers.json

@@ -90,7 +90,7 @@
       "description": "Filesystem operations (set your path)"
     },
     "insaits": {
-      "command": "python",
+      "command": "python3",
       "args": ["-m", "insa_its.mcp_server"],
       "description": "AI-to-AI security monitoring — anomaly detection, credential exposure, hallucination checks, forensic tracing. 23 anomaly types, OWASP MCP Top 10 coverage. 100% local. Install: pip install insa-its"
     }