fix(container): scope orphan reaper by install label so peers don't kill each other

Two installs on the same host could trash each other's containers: the
reaper used `docker ps --filter name=nanoclaw-`, a substring match that
picked up every install's containers. A crash-looping peer (e.g. a legacy
v1 plist respawning ~6k times) would call cleanupOrphans on every boot and
kill the healthy install's session containers within seconds of spawn.

- Stamp `--label nanoclaw-install=<slug>` onto every spawned container.
- cleanupOrphans filters by that label; healthy peers are left alone.
- Setup preflight enumerates `com.nanoclaw*` launchd plists / nanoclaw
  user systemd units, probes state/runs, and unloads any that are
  crash-looping (state != running AND runs > 10) before installing
  this install's service.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

setup/service.ts

@@ -11,6 +11,7 @@ import path from 'path';
 
 import { log } from '../src/log.js';
 import { getLaunchdLabel, getSystemdUnit } from '../src/install-slug.js';
+import { cleanupUnhealthyPeers } from './peer-cleanup.js';
 import {
   commandExists,
   getPlatform,
@@ -53,6 +54,19 @@ export async function run(_args: string[]): Promise<void> {
 
   fs.mkdirSync(path.join(projectRoot, 'logs'), { recursive: true });
 
+  // Peer preflight — a crash-looping peer install (most often the legacy v1
+  // `com.nanoclaw` plist) will keep trashing this install's containers on
+  // every respawn via its own cleanupOrphans. Detect and unload any peer
+  // that's unhealthy before we install our service. Healthy peers are left
+  // alone now that container reaping is install-label-scoped.
+  const peerReport = cleanupUnhealthyPeers(projectRoot);
+  if (peerReport.unloaded.length > 0) {
+    log.warn('Unloaded unhealthy peer NanoClaw services', {
+      count: peerReport.unloaded.length,
+      labels: peerReport.unloaded.map((p) => p.label),
+    });
+  }
+
   if (platform === 'macos') {
     setupLaunchd(projectRoot, nodePath, homeDir);
   } else if (platform === 'linux') {