chore(jobs): enforce sidechat targets for mainloop rollout jobs p1-p4

jobs/mainloop-p1-pilot.json

@@ -3,6 +3,7 @@
   "description": "P1 main_loop rollout (owner 646, ETA 48h): harden 5-min self-monitor pilot on muse+646. Enable/disable round-trip via API+Box UI in one interval; verify watermark semantics; confirm digest quality on live traffic.",
   "schedule": "manual",
   "agent": "646",
+  "target": "646 tasks",
   "timeout": 3600,
   "on_failure": "alert",
   "chain_next": "mainloop-p2-noswitcher",

jobs/mainloop-p2-noswitcher.json

@@ -3,6 +3,7 @@
   "description": "P2 main_loop rollout (owner opm, 646 verifies): NO_SWITCHER repair for pip+opm. VERIFIED GREEN 2026-10-04 ~20:05 UTC: consecutive main-loop checks all-ok, CDP live, browsers on muse.ai chat threads. Kept as repair record.",
   "schedule": "manual",
   "agent": "opm",
+  "target": "main-loop brain",
   "timeout": 1800,
   "on_failure": "alert",
   "chain_next": "mainloop-p3-bridge",

jobs/mainloop-p3-bridge.json

@@ -3,6 +3,7 @@
   "description": "P3 main_loop rollout (owner 646, ETA 1wk): bridge registry becomes the chat to side-chat map. Fix br-ID collisions (two share br-20261003191930); reconcile main-chat bridge design with BRIDGE_SPEC.md; 646-pip-coord is the topology template.",
   "schedule": "manual",
   "agent": "646",
+  "target": "646 tasks",
   "timeout": 3600,
   "on_failure": "alert",
   "chain_next": "mainloop-p4-steady",

jobs/mainloop-p4-steady.json

@@ -3,6 +3,7 @@
   "description": "P4 main_loop rollout (owner 646, opm supports, ETA 2wk): steady state. Alerting on consecutive errors + watermark staleness; operator SOP for toggles; escalation path for unanswered prompts (DM nudge, box alert, human).",
   "schedule": "manual",
   "agent": "646",
+  "target": "646 tasks",
   "timeout": 3600,
   "on_failure": "alert",
   "chain_next": null,