fix: Fix remaining 61 ruff linting errors (SIM102, SIM117)

Fixed all remaining linting errors from the 310 total:
- SIM102: Combined nested if statements (31 errors)
  - adaptors/openai.py
  - config_extractor.py
  - codebase_scraper.py
  - doc_scraper.py
  - github_fetcher.py
  - pattern_recognizer.py
  - pdf_scraper.py
  - test_example_extractor.py

- SIM117: Combined multiple with statements (24 errors)
  - tests/test_async_scraping.py (2 errors)
  - tests/test_github_scraper.py (2 errors)
  - tests/test_guide_enhancer.py (20 errors)

- Fixed test fixture parameter (mock_config in test_c3_integration.py)

All 700+ tests passing.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

tests/test_server_fastmcp_http.py

@@ -69,7 +69,7 @@ class TestFastMCPHTTP:
 
         app = mcp.sse_app()
 
-        with TestClient(app) as client:
+        with TestClient(app):
             # SSE endpoint should exist (even if we can't fully test it without MCP client)
             # Just verify the route is registered
             routes = [route.path for route in app.routes if hasattr(route, "path")]