Audit cron/launchd/daemon — remove dead jobs and document canonical services

- Remove Triage Heartbeat and PR Review Sweep (dashboard-era dead jobs)
- These were paused on 2026-04-04: "Dashboard repo frozen - loops redirected to the-nexus"
- Document current canonical fleet services in docs/CANONICAL_SERVICES.md
- Update cron/audit-report.json to reflect removal

Hard rule compliance: VPS crontabs untouched (per #880)
Closes #880

cron/audit-report.json

@@ -1,42 +1,16 @@
 {
   "audit_time": "2026-04-17T05:34:45.162227+00:00",
-  "total_jobs": 33,
-  "hermes_jobs": 8,
+  "total_jobs": 31,
+  "hermes_jobs": 6,
   "crontab_jobs": 25,
   "summary": {
-    "healthy": 33,
+    "healthy": 31,
     "transient_errors": 0,
     "systemic_failures": 0
   },
   "systemic_jobs": [],
   "transient_jobs": [],
   "all_jobs": [
-    {
-      "id": "9e0624269ba7",
-      "name": "Triage Heartbeat",
-      "schedule": "every 15m",
-      "state": "paused",
-      "enabled": false,
-      "last_status": "ok",
-      "last_error": null,
-      "last_run_at": "2026-03-24T15:33:57.749458-04:00",
-      "category": "healthy",
-      "reason": "Dashboard repo frozen - loops redirected to the-nexus",
-      "action": "none \u2014 paused intentionally"
-    },
-    {
-      "id": "e29eda4a8548",
-      "name": "PR Review Sweep",
-      "schedule": "every 30m",
-      "state": "paused",
-      "enabled": false,
-      "last_status": "ok",
-      "last_error": null,
-      "last_run_at": "2026-03-24T15:21:42.995715-04:00",
-      "category": "healthy",
-      "reason": "Dashboard repo frozen - loops redirected to the-nexus",
-      "action": "none \u2014 paused intentionally"
-    },
     {
       "id": "a77a87392582",
       "name": "Health Monitor",