fix: add parentAgentId to stored agent record schema

- Added `parentAgentId` field to `STORED_AGENT_SCHEMA` in agent-registry.ts
- Updated `toStoredAgentRecord()` in agent-projections.ts to include parentAgentId
- This ensures parentAgentId is persisted to agents.json for parent/child hierarchy

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/server/src/server/agent/agent-projections.ts

@@ -52,6 +52,7 @@ export function toStoredAgentRecord(
     attentionTimestamp: agent.attention.requiresAttention
       ? agent.attention.attentionTimestamp.toISOString()
       : null,
+    parentAgentId: agent.parentAgentId ?? null,
   } satisfies StoredAgentRecord;
 }
 

packages/server/src/server/agent/agent-registry.ts

@@ -53,6 +53,7 @@ const STORED_AGENT_SCHEMA = z.object({
   requiresAttention: z.boolean().optional(),
   attentionReason: z.enum(["finished", "error", "permission"]).nullable().optional(),
   attentionTimestamp: z.string().nullable().optional(),
+  parentAgentId: z.string().nullable().optional(),
 });
 
 export type SerializableAgentConfig = Pick<