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fbbe8a1be9
Add Blinker signal handlers to emit OTEL spans for app CRUD operations and user feedback events. All handlers use enum-based span/counter names for type safety. App lifecycle telemetry: - app_was_created: Emit span + requests counter - app_was_deleted: Emit span + requests counter - app_was_updated: Emit span only Feedback telemetry: - feedback_was_created: Emit span + feedback counter - Privacy gating via exporter.include_content flag Infrastructure changes: - Add missing signal exports to events/app_event.py - Create events/feedback_event.py with feedback_was_created signal - Emit app_was_deleted signal in services/app_service.py - Emit feedback_was_created signal in services/message_service.py Handlers are registered at import time via @signal.connect decorators and loaded during ext_enterprise_telemetry.init_app().