fix(coding-agent): fixed parked subagent restoration from persisted sessions

- Fixed cold revival flow so parked subagents are restored from persisted sessions at startup.
- Fixed session-init persistence to include spawns and readSummarize fields for replay accuracy.
- Fixed latest-session lookup by adding peekSessionInit for lock-free persisted contract access.
- Added lifecycle and session tests for cold-revive success, decline, and retry paths.

packages/coding-agent/src/task/executor.ts

@@ -2098,6 +2098,8 @@ export async function runSubprocess(options: ExecutorOptions): Promise<SingleRes
 				systemPrompt: session.agent.state.systemPrompt.join("\n\n"),
 				task,
 				tools: session.getActiveToolNames(),
+				spawns: spawnsEnv,
+				readSummarize: agent.readSummarize,
 				outputSchema,
 			});