chore: keep agent run worker alive during gray rollout

docs/agent-run-worker-rollout-runbook.md

@@ -174,6 +174,8 @@ bash /Users/john/Project/Memind/scripts/install-agent-run-worker-agent.sh
 MEMIND_AGENT_RUN_WORKER_EXPECT_RUNNING=1 node /Users/john/Project/Memind/scripts/check-agent-run-worker.mjs
 ```
 
+The worker LaunchAgent must have `KeepAlive=true` during all-user gray so a clean worker exit does not leave code-run queue processing stopped.
+
 8. Submit only code runs with validation metadata.
 
 Required user message metadata:

docs/architecture/memind-2-streaming-agent-runtime-plan.md

@@ -2099,7 +2099,7 @@ installer 默认行为:
   - `/Users/john/Library/LaunchAgents/cn.tkmind.memind-agent-run-worker.plist`
 - 默认:
   - `RunAtLoad=false`
-  - `KeepAlive=false`
+  - `KeepAlive=true`
   - `launchctl disable`
   - 不 `kickstart`
 - 默认环境:
@@ -2640,6 +2640,7 @@ runtime/status:
 备份:
 
 - `/Users/john/Project/memind_backups/20260702-114335-p615-validation-metadata`
+- worker KeepAlive 运维补强备份: `/Users/john/Project/memind_backups/20260702-115330-worker-keepalive`
 
 ## 回滚策略
 

scripts/install-agent-run-worker-agent.sh

@@ -49,7 +49,7 @@ cat > "$PLIST" <<EOF
   <key>RunAtLoad</key>
   <false/>
   <key>KeepAlive</key>
-  <false/>
+  <true/>
   <key>ThrottleInterval</key>
   <integer>10</integer>
   <key>StandardOutPath</key>