🛡️ Sentinel: [CRITICAL] Fix Werkzeug interactive debugger exposure

[benpiper]

🚨 Severity: CRITICAL
💡 Vulnerability: Werkzeug interactive debugger exposure. Flask was running with debug=True on host 0.0.0.0, exposing the debugger to all network interfaces.
🎯 Impact: The interactive debugger allows execution of arbitrary Python code, leading to remote code execution (RCE) on the server.
🔧 Fix: Changed debug=True to debug=False in app.run() in web_app/app.py and web_app/run.py.
✅ Verification: Ensured the codebase still runs tests and linting passes without issue.

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PR created automatically by Jules for task 7173534602289538660 started by @benpiper

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