fix: Resolve 61 critical linting errors

Fixed priority linting errors to improve code quality:

Critical Fixes:
- F821 (2 errors): Fixed undefined name 'original_result' in config_enhancer.py
- UP035 (2 errors): Removed deprecated typing.Dict and typing.Type imports
- F401 (27 errors): Removed unused imports and added noqa for availability checks
- E722 (19 errors): Replaced bare 'except:' with 'except Exception:'

Code Quality Improvements:
- SIM201 (4 errors): Simplified 'not x == y' to 'x != y'
- SIM118 (2 errors): Removed unnecessary .keys() in dict iterations
- E741 (4 errors): Renamed ambiguous variable 'l' to 'line'
- I001 (1 error): Sorted imports in test_bootstrap_skill.py

All modified areas tested and passing:
- test_scraper_features.py: 42 passed
- test_integration.py: 51 passed
- test_architecture_scenarios.py: 11 passed
- test_real_world_fastmcp.py: 19 passed (1 skipped)

Remaining linting errors: 249 (mostly code style suggestions like ARG002, F841, SIM102)

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

src/skill_seekers/cli/config_enhancer.py

@@ -267,9 +267,9 @@ Focus on actionable insights that help developers understand and improve their c
 
             if result_data:
                 # Merge LOCAL enhancements
-                original_result["ai_enhancements"] = result_data
+                result["ai_enhancements"] = result_data
                 logger.info("✅ LOCAL enhancement complete")
-                return original_result
+                return result
             else:
                 logger.warning("⚠️  LOCAL enhancement produced no results")
                 return result
@@ -370,7 +370,7 @@ Focus on actionable insights:
                         if "file_enhancements" in data or "overall_insights" in data:
                             logger.info(f"✅ Found enhancement data in {json_file.name}")
                             return data
-                except:
+                except Exception:
                     continue
 
             logger.warning("⚠️  Could not find enhancement output file")