docs: move SubagentStop hook config to claude-runner CT

The hook belongs on the instance running long-running subagents,
not in the claude-home repo settings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/settings.json

@@ -6,14 +6,5 @@
   "allowed_working_directories": [
     "/mnt/NV2/Development/claude-home",
     "/mnt/media"
-  ],
-  "hooks": {
-    "SubagentStop": [
-      {
-        "type": "http",
-        "url": "http://localhost:5678/webhook/claude-agent-done",
-        "async": true
-      }
   ]
-  }
 }

productivity/n8n/CONTEXT.md

@@ -294,7 +294,8 @@ ssh root@10.10.0.210 "docker stats --no-stream n8n n8n-postgres"
 **Related Files:**
 - `workflows/claude-agent-notifications.md` - Setup guide
 - `workflows/claude-agent-done.json` - Importable n8n workflow
-- `.claude/settings.json` (repo root) - Claude Code hook config
+
+**Hook Config:** The `SubagentStop` HTTP hook should be configured in the `.claude/settings.json` of whichever Claude Code instance runs long-running subagents (e.g. `claude-runner` CT 302), not in `claude-home`.
 
 **Custom Variables:**
 - `DISCORD_CLAUDE_ALERTS_WEBHOOK` - Discord webhook URL for the target channel