Add Kubernetes event recording to AgentReconciler

[Copilot]

AgentReconciler had no event emission despite RBAC markers already in place and the webhook layer already using events.EventRecorder. This adds observability into reconciliation activity via kubectl describe agent.

Changes

• AgentReconciler struct — added Recorder events.EventRecorder field (same k8s.io/client-go/tools/events package as the webhook layer; no new dependencies)
• emitEvent helper — nil-guarded wrapper around Recorder.Eventf so the field is optional
• Event emission in the reconcile loop:
  • Normal/Created — Deployment or Service newly created
  • Normal/Updated — Deployment or Service updated; successful reconciliation
  • Warning/ReconcileFailed — subAgent/tool/AiGateway resolution failure, Deployment or Service reconciliation failure
• cmd/main.go — wired recorder via mgr.GetEventRecorder("agent-controller")
• 7 test files — BeforeEach blocks updated to supply &events.FakeRecorder{}

Example events visible after this change

kubectl describe agent my-agent
...
Events:
  Type    Reason    Age  From              Message
  ----    ------    ---  ----              -------
  Normal  Created   5s   agent-controller  Deployment my-agent created
  Normal  Created   5s   agent-controller  Service my-agent created
  Normal  Updated   3s   agent-controller  Agent reconciled successfully

Original prompt

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This section details on the original issue you should resolve

<issue_title>Emit Kubernetes events from Agent controller on reconciliation</issue_title>
<issue_description>## Summary

The AgentReconciler currently does not emit Kubernetes events when reconciling Agent resources. Adding event recording would improve observability by surfacing reconciliation activity (e.g. agent updated, deployment created, reconcile failed) via kubectl describe agent <name> and kubectl get events.

Current State

• RBAC markers for events and events.k8s.io are already in place (agent_reconciler.go lines 68-69)
• The webhook layer already uses EventRecorder for recording events
• The AgentReconciler struct has no Recorder field

Proposed Changes

1. Add record.EventRecorder to AgentReconciler struct (internal/controller/agent_reconciler.go)
2. Wire the recorder in cmd/main.go via mgr.GetEventRecorderFor("agent-controller")
3. Emit events in the reconcile loop for key state transitions:
   • Normal / Updated — Agent spec reconciled successfully
   • Normal / Created — Deployment or Service created
   • Warning / ReconcileFailed — Reconciliation error
4. Update tests to supply a fake recorder in BeforeEach blocks

Acceptance Criteria

• kubectl describe agent <name> shows events for create/update/error
• Existing tests pass with the recorder wired in
• No new dependencies introduced (uses k8s.io/client-go/tools/record)</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Emit Kubernetes events from Agent controller on reconciliation #81

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