feat: add InsAIts PostToolUse security monitoring hook

- Add insaits-security-monitor.py: real-time AI security monitoring
  hook that catches credential exposure, prompt injection,
  hallucinations, and 20+ other anomaly types
- Update hooks.json with InsAIts PostToolUse entry
- Update hooks/README.md with InsAIts in PostToolUse table
- Add InsAIts MCP server entry to mcp-configs/mcp-servers.json

InsAIts (https://github.com/Nomadu27/InsAIts) is an open-source
runtime security layer for multi-agent AI. It runs 100% locally
and writes tamper-evident audit logs to .insaits_audit_session.jsonl.

Install: pip install insa-its

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

mcp-configs/mcp-servers.json

@@ -88,6 +88,11 @@
       "command": "npx",
       "args": ["-y", "@modelcontextprotocol/server-filesystem", "/path/to/your/projects"],
       "description": "Filesystem operations (set your path)"
+    },
+    "insaits": {
+      "command": "python",
+      "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"
     }
   },
   "_comments": {