🐛 Bug Fix: Duplicate Event Processing

🐛 Bug Fix: Duplicate Event Processing

Fixed critical bug where events were being processed twice, causing duplicate event handler executions.

What Changed

• Before: Events were processed through both process_events() and emit_events(), causing duplicate execution
• After: Events are now processed exactly once through EventEmitter, which handles routing internally

Impact

✅ Events processed exactly once
✅ Improved performance
✅ Simplified internal API
✅ No breaking changes for end users

Technical Details

• Removed duplicate processing logic from EventProcessor
• Simplified EventProcessor API (removed container and middleware_chain parameters)
• EventEmitter now handles all event routing (DomainEvent → handlers, NotificationEvent → broker)

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