Add Python support for check_pattern regex matchers

[protonese3]

Description

Several regex matchers in check_pattern.rs only target JavaScript/TypeScript. Add Python-specific patterns for the same vulnerabilities.

Examples

• Django raw SQL: cursor.execute(f"SELECT... or .extra(where=[f"...
• Flask debug: app.run(debug=True)
• Jinja2 without autoescape: Environment(autoescape=False)
• Python SSRF: requests.get(user_input) without URL validation
• Pickle deserialization: pickle.loads(user_data)

Files to edit

• src/tools/knowledge/check_pattern.rs — add Python patterns to existing matchers or create new ones

[Tosinibikunle]

Hi, I would like to work on this