feat(14-02): add phase domain events

- PhaseQueuedEvent for tracking phases awaiting execution
- PhaseStartedEvent for phase execution start
- PhaseCompletedEvent for phase completion with success flag
- PhaseBlockedEvent for blocked phases with reason

src/events/types.ts

@@ -240,6 +240,45 @@ export interface TaskBlockedEvent extends DomainEvent {
   };
 }
 
+/**
+ * Phase Events
+ */
+
+export interface PhaseQueuedEvent extends DomainEvent {
+  type: 'phase:queued';
+  payload: {
+    phaseId: string;
+    initiativeId: string;
+    dependsOn: string[];
+  };
+}
+
+export interface PhaseStartedEvent extends DomainEvent {
+  type: 'phase:started';
+  payload: {
+    phaseId: string;
+    initiativeId: string;
+  };
+}
+
+export interface PhaseCompletedEvent extends DomainEvent {
+  type: 'phase:completed';
+  payload: {
+    phaseId: string;
+    initiativeId: string;
+    success: boolean;
+    message?: string;
+  };
+}
+
+export interface PhaseBlockedEvent extends DomainEvent {
+  type: 'phase:blocked';
+  payload: {
+    phaseId: string;
+    reason: string;
+  };
+}
+
 /**
  * Merge Coordination Events
  */
@@ -308,6 +347,10 @@ export type DomainEventMap =
   | TaskDispatchedEvent
   | TaskCompletedEvent
   | TaskBlockedEvent
+  | PhaseQueuedEvent
+  | PhaseStartedEvent
+  | PhaseCompletedEvent
+  | PhaseBlockedEvent
   | MergeQueuedEvent
   | MergeStartedEvent
   | MergeCompletedEvent