Eventwatcher failure notification

[Ansita20]

Summary

This PR fixes missing error reporting when event handling fails by properly notifying the API with EVENT_FAILURE status.

Previously, failures during event handling were not correctly propagated, which limited observability and prevented downstream components from reacting to these failures.

Changes

• Report event handling failures to the API using EVENT_FAILURE
• Include clear and descriptive error messages explaining why the event failed
• Ensure the control-plane and Deployments can react appropriately to failed events

Benefits

• ✅ Proper error notification: Failures are now correctly reported to the API with EVENT_FAILURE status
• ✅ Subsequent deployment triggers: The control-plane and Deployments can now react to event handling failures
• ✅ Better observability: Clear error messages explain why events failed to be handled
• ✅ No breaking changes: Existing functionality remains intact; only adds missing error reporting

Validation

• The code has been validated and compiles successfully
• No existing behavior is changed apart from adding missing failure reporting

Related Issue

Closes #4750

[eeshaanSA]

Changes to Contributing.md should be done in a separate PR. Please change.

[Copilot]

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[Ansita20]

Changes to Contributing.md should be done in a separate PR. Please change.

Yes sir I wll make the changes.

[Ansita20]

@eeshaanSA
Sir, I have made the required changes. I accidentally merged the file along with the CONTRIBUTE.md changes earlier sorry about that. I’ve now fixed the commit and updated it properly.