Configuration Hot-Reload

[michaelbeale-IL]

Implement FileSystemWatcher for config changes with safe reload mechanism.

Acceptance Criteria:

• FileSystemWatcher configured for config directory
• Validation before applying changes
• Event notification for config changes
• Rollback on validation failure
• Throttling/debouncing for rapid changes
• Tests for reload scenarios

Technical Details:

• Watch user config directory
• Validate new config before applying
• Raise events for config changes
• Support canceling reload
• Handle file lock issues

Files to Modify:

• Create Libraries/ACATCore/Utility/ConfigurationWatcher.cs
• Update preference classes to support reload
• Add event handlers in consuming code

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Epic: Configuration System Enhancement

Estimated Effort: 3 days

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Parent Feature: #191 - Configuration System Enhancement