chore(config): enable heartbeat monitor in default automation settings

config/default.yaml

@@ -449,6 +449,19 @@ agents:
 #     provider_error_rate_threshold: 0.5
 #     provider_error_min_calls: 5
 
+automation:
+  heartbeat:
+    enabled: true
+    interval: "5m"
+    notify_cooldown: "30m"
+    checks: [gateway, model, channels, memory, disk, process_memory, backup, provider_errors]
+    failure_threshold: 2
+    disk_threshold_mb: 100
+    process_memory_threshold_mb: 1500
+    backup_failure_threshold: 1
+    provider_error_rate_threshold: 0.5
+    provider_error_min_calls: 5
+
 # ── Backup ──────────────────────────────────────────────────────────
 # Snapshot sessions.db, vectors.db (optional), and memory/ into a tarball.
 # If MinIO is enabled, upload with `mc` using ephemeral credentials.

docs/plans/state.json

@@ -5721,6 +5721,17 @@
         "docs/plans/state.json"
       ],
       "test_status": "pnpm typecheck passing"
+    },
+    "default-config-heartbeat-enabled": {
+      "status": "completed",
+      "date": "2026-02-19",
+      "updated": "2026-02-19",
+      "summary": "Enabled automation heartbeat monitoring in default config with standard 5-minute cadence and full check set (gateway/model/channels/memory/disk/process memory/backup/provider errors).",
+      "files_modified": [
+        "config/default.yaml",
+        "docs/plans/state.json"
+      ],
+      "test_status": "configuration-only change"
     }
   },
   "overall_progress": {