merge: pi-durable(智能体运行时迁到 pi-durable 1.1 + pi-ai 1.1)

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

# Conflicts:
#	CHANGELOG.md

packages/contracts/src/agent-events.ts

@@ -63,6 +63,8 @@ const ToolCallEnd = z.object({
   /** 已脱敏、截断的输出摘要 */
   outputSummary: z.string(),
   recovery: z.boolean(),
+  /** 工具执行耗时(毫秒,单调时钟;没真正执行的调用没有) */
+  durationMs: z.number().int().nonnegative().optional(),
 });
 const ToolCallRejected = z.object({
   type: z.literal("tool_call_rejected"),