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/plugin_system/schema_manager.py

@@ -445,3 +445,62 @@ class SchemaManager:
         replace_none_with_defaults(merged, defaults)
         return merged
 
+    def detect_config_key_collisions(
+        self,
+        plugin_ids: List[str]
+    ) -> List[Dict[str, Any]]:
+        """
+        Detect config key collisions between plugins.
+
+        Checks for:
+        1. Plugin IDs that collide with reserved system config keys
+        2. Plugin IDs that might cause confusion or conflicts
+
+        Args:
+            plugin_ids: List of plugin identifiers to check
+
+        Returns:
+            List of collision warnings, each containing:
+            - type: 'reserved_key_collision' or 'case_collision'
+            - plugin_id: The plugin ID involved
+            - message: Human-readable warning message
+        """
+        collisions = []
+
+        # Reserved top-level config keys that plugins should not use as IDs
+        reserved_keys = {
+            'display', 'schedule', 'timezone', 'plugin_system',
+            'display_modes', 'system', 'hardware', 'debug',
+            'log_level', 'emulator', 'web_interface'
+        }
+
+        # Track plugin IDs for case collision detection
+        lowercase_ids: Dict[str, str] = {}
+
+        for plugin_id in plugin_ids:
+            # Check reserved key collision
+            if plugin_id.lower() in {k.lower() for k in reserved_keys}:
+                collisions.append({
+                    "type": "reserved_key_collision",
+                    "plugin_id": plugin_id,
+                    "message": f"Plugin ID '{plugin_id}' conflicts with reserved config key. "
+                               f"This may cause configuration issues."
+                })
+
+            # Check for case-insensitive collisions between plugins
+            lower_id = plugin_id.lower()
+            if lower_id in lowercase_ids:
+                existing_id = lowercase_ids[lower_id]
+                if existing_id != plugin_id:
+                    collisions.append({
+                        "type": "case_collision",
+                        "plugin_id": plugin_id,
+                        "conflicting_id": existing_id,
+                        "message": f"Plugin ID '{plugin_id}' may conflict with '{existing_id}' "
+                                   f"on case-insensitive file systems."
+                    })
+            else:
+                lowercase_ids[lower_id] = plugin_id
+
+        return collisions
+