test(P01): coverage-gate verification — all 9 packages hit tiered floor (T01.12, REQ-057)

>=70%: engine 88.9%, proxmox 87.1%, cli 76.2%, transport 93.0%,
       store 84.7%, jobspec 90.5%
>=50%: audit 100.0%, certpaths 100.0%, cmd/orca 80.0%
go test -race ./... PASS. GRILL escape valve NOT needed.

---ci---
project: orca
phase: 1
milestone: v0.8
status: execute
requirements:
  covered: [REQ-057]
  partial: []
---/ci---

.ciagent/CHECKPOINT.json

@@ -1,11 +1,22 @@
 {
-  "phase": 0,
-  "stage": "grill",
+  "phase": 1,
+  "stage": "execute",
   "milestone": "v0.8",
   "milestone_slug": "coverage-trust-hardening",
-  "phase_role": "pre_execution",
+  "phase_role": "execution",
   "attempts": 0,
-  "updated_at": "2026-08-04T00:48:00Z",
+  "updated_at": "2026-08-04T00:55:00Z",
   "milestone_complete": false,
-  "next_milestone": null
+  "next_milestone": null,
+  "coverage": {
+    "internal/engine": "88.9%",
+    "internal/proxmox": "87.1%",
+    "internal/cli": "76.2%",
+    "internal/transport": "93.0%",
+    "internal/store": "84.7%",
+    "internal/jobspec": "90.5%",
+    "internal/audit": "100.0%",
+    "internal/certpaths": "100.0%",
+    "cmd/orca": "80.0%"
+  }
 }