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>

src/skill_seekers/cli/pdf_extractor_poc.py

@@ -786,10 +786,7 @@ class PDFExtractor:
         page = self.doc.load_page(page_num)
 
         # Extract plain text (with OCR if enabled - Priority 2)
-        if self.use_ocr:
-            text = self.extract_text_with_ocr(page)
-        else:
-            text = page.get_text("text")
+        text = self.extract_text_with_ocr(page) if self.use_ocr else page.get_text("text")
 
         # Extract markdown (better structure preservation)
         markdown = page.get_text("markdown")