🛡️ Sentinel: [CRITICAL] Remove hardcoded database credentials

[google-labs-jules]

This PR addresses a CRITICAL security vulnerability where database credentials were hardcoded in code/collection/dbconfig.ini.

Changes:

1. Deleted code/collection/dbconfig.ini.
2. Modified code/collection/databaseHandler.py to:
   • Use os.environ.get() to read credentials (DB_USER, DB_PASSWD, DB_HOST, DB_NAME, etc.).
   • Fallback to reading dbconfig.ini if environment variables are missing (for local dev).
   • Fix ConfigParser import for Python 3 compatibility.
3. Resolved merge conflicts in requirements.txt to allow successful dependency installation.

Verification:

• The code now runs without dbconfig.ini present (assuming env vars are set or connection fails gracefully).
• Secrets are no longer in the codebase.

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PR created automatically by Jules for task 15520871591335115646 started by @prajitdas

[google-labs-jules]

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