docs(P00): complete v0.7 pre-execution phase — shipped v0.6.0

Tag + merge + Gitea release #399 all succeeded. Phase 0 complete.

---ci---
project: orca
phase: 0
milestone: v0.7
status: complete
---/ci---

.ciagent/CHECKPOINT.json

@@ -1,11 +1,11 @@
 {
   "phase": 0,
-  "stage": "plan",
+  "stage": "complete",
   "milestone": "v0.7",
   "milestone_slug": "hardening-completion",
   "phase_role": "pre_execution",
   "attempts": 0,
-  "updated_at": "2026-08-03T20:55:00Z",
+  "updated_at": "2026-08-03T23:55:00Z",
   "milestone_complete": false,
   "next_milestone": null
 }

.ciagent/ROADMAP.md

@@ -119,7 +119,7 @@ Scope: NFR milestone closing gaps surfaced by the v0.7 IDEATE stage —
 an unreachable command tree, a missing config file layer, low test
 coverage in core packages, and the long-deferred pprof endpoint.
 
-- [ ] Phase 0: Pre-execution (specify → clarify → research → ideate → plan) — tag `v0.6.0`
+- [x] Phase 0: Pre-execution (specify → clarify → research → ideate → plan) — tag `v0.6.0` (shipped)
 - [ ] Phase 1: Register `orca cert` command tree + cert_repo tests (REQ-053) — tag `v0.6.1`
 - [ ] Phase 2: HCL config file parsing — `internal/config` package (REQ-054) — tag `v0.6.2`
 - [ ] Phase 3: Test coverage uplift — engine/transport/proxmox/audit ≥ 50% (REQ-055) — tag `v0.6.3`