feat: add error detection, monitoring, and code quality improvements (#223)

* feat: add error detection, monitoring, and code quality improvements

This comprehensive update addresses automatic error detection, code
quality, and plugin development experience:

## Error Detection & Monitoring
- Add ErrorAggregator service for centralized error tracking
- Add pattern detection for recurring errors (5+ in 60 min)
- Add error dashboard API endpoints (/api/v3/errors/*)
- Integrate error recording into plugin executor

## Code Quality
- Remove 10 silent `except: pass` blocks in sports.py and football.py
- Remove hardcoded debug log paths
- Add pre-commit hooks to prevent future bare except clauses

## Validation & Type Safety
- Add warnings when plugins lack config_schema.json
- Add config key collision detection for plugins
- Improve type coercion logging in BasePlugin

## Testing
- Add test_config_validation_edge_cases.py
- Add test_plugin_loading_failures.py
- Add test_error_aggregator.py

## Documentation
- Add PLUGIN_ERROR_HANDLING.md guide
- Add CONFIG_DEBUGGING.md guide

Note: GitHub Actions CI workflow is available in the plan but requires
workflow scope to push. Add .github/workflows/ci.yml manually.

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

* fix: address code review issues

- Fix GitHub issues URL in CONFIG_DEBUGGING.md
- Use RLock in error_aggregator.py to prevent deadlock in export_to_file
- Distinguish missing vs invalid schema files in plugin_manager.py
- Add assertions to test_null_value_for_required_field test
- Remove unused initial_count variable in test_plugin_load_error_recorded
- Add validation for max_age_hours in clear_old_errors API endpoint

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

---------

Co-authored-by: Chuck <chuck@example.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

src/base_classes/football.py

@@ -387,43 +387,8 @@ class FootballLive(Football, SportsLive):
             main_img = main_img.convert('RGB') # Convert for display
 
             # Display the final image
-            # #region agent log
-            import json
-            import time
-            try:
-                with open('/home/chuck/Github/LEDMatrix/.cursor/debug.log', 'a') as f:
-                    f.write(json.dumps({
-                        "sessionId": "debug-session",
-                        "runId": "run1",
-                        "hypothesisId": "C",
-                        "location": "football.py:390",
-                        "message": "About to update display",
-                        "data": {
-                            "force_clear": force_clear,
-                            "game": game.get('away_abbr', '') + "@" + game.get('home_abbr', '')
-                        },
-                        "timestamp": int(time.time() * 1000)
-                    }) + "\n")
-            except: pass
-            # #endregion
             self.display_manager.image.paste(main_img, (0, 0))
             self.display_manager.update_display() # Update display here for live
-            # #region agent log
-            try:
-                with open('/home/chuck/Github/LEDMatrix/.cursor/debug.log', 'a') as f:
-                    f.write(json.dumps({
-                        "sessionId": "debug-session",
-                        "runId": "run1",
-                        "hypothesisId": "C",
-                        "location": "football.py:392",
-                        "message": "After update display",
-                        "data": {
-                            "force_clear": force_clear
-                        },
-                        "timestamp": int(time.time() * 1000)
-                    }) + "\n")
-            except: pass
-            # #endregion
 
         except Exception as e:
             self.logger.error(f"Error displaying live Football game: {e}", exc_info=True) # Changed log prefix