🛡️ Sentinel: [CRITICAL] Fix SQL injection risk in dynamic database queries

[davidjuarezdev]

🚨 Severity: CRITICAL
💡 Vulnerability: SQL injection vulnerability via Python's assert and **kwargs dictionary unpacking bypass in dynamic database queries (streamrip/db.py).
🎯 Impact: If the Python interpreter runs with the optimization flag -O, assert statements are stripped out entirely. An attacker (or corrupted input) could pass malicious column names via **kwargs dictionary unpacking (which allows any identifier), completely bypassing the key validation logic in DatabaseBase.contains. The keys were then concatenated directly into a query string, leading to SQL injection. Additionally, DatabaseBase.remove had no key validation at all.
🔧 Fix:

• Modified DatabaseBase.contains to use raise ValueError instead of assert to ensure the key validation runs regardless of optimization flags.
• Added equivalent explicit key validation to DatabaseBase.remove.
• Added a Sentinel learning journal entry in .jules/sentinel.md documenting this edge case.
  ✅ Verification:
• Validated via automated test suites (all 60 pytest suites passing).
• Run formatting and linting.

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PR created automatically by Jules for task 11980032661180759317 started by @davidjuarezdev