Modified `scripts/web_dashboard.py` to:
- Catch all exceptions in the dashboard route.
- Log exceptions securely using `logging` instead of printing to stdout.
- Return a generic "Internal Server Error" message (500) instead of the raw exception string.
This prevents internal implementation details (e.g., file paths, database errors) from being exposed to the user.
Added `test_error_leakage` to `scripts/test_web_dashboard.py` to verify the fix and prevent regressions.
- Changed `check_authorized` in `scripts/telegram_deploy_bot.py` to fail closed (deny all) if `TELEGRAM_ALLOWED_USER_IDS` is unset or empty.
- Updated `scripts/TELEGRAM_BOT_SETUP.md` and `QUICK_DEPLOY.md` to document that `TELEGRAM_ALLOWED_USER_IDS` is now mandatory for bot access.
- Added Sentinel Journal entry in `.jules/sentinel.md` documenting the vulnerability and learning.
- Verified fix with reproduction script.
