fix(memory): add perspectiveSource to ICognitiveMemoryManager.encode interface

CI build failed because the public ICognitiveMemoryManager interface
was missing the perspectiveSource option I added to the class
implementation. AgentMemory.recall types against the interface, so
TypeScript refused the perspectiveSource property when threading
through to manager.encode.

Add the option to the interface so the two signatures match.

Author: jddunn

src/cognition/memory/CognitiveMemoryManager.ts

@@ -111,6 +111,13 @@ export interface ICognitiveMemoryManager {
       contentSentiment?: number;
       tags?: string[];
       entities?: string[];
+      /**
+       * When encoding a subjective trace from {@link PerspectiveObserver},
+       * thread the source-event identifiers through so the resulting
+       * {@link MemoryTrace} carries the `MechanismMetadata` fields that
+       * `applyReconsolidation` reads at retrieval time.
+       */
+      perspectiveSource?: { eventId: string; eventHash: string };
     }
   ): Promise<MemoryTrace>;