docs(P00): validate specification — v1.27 PO state catalog + ciagent compression

NFR milestone. Establishes v1.27 (tag line v1.26.x):
- Author .ciagent/STATE.md — PO-facing capability catalog (backfill
  CAP-001..036 across 10 domains + 11 invariants distilled from
  PROJECT.md load-bearing decisions D-034..D-072).
- Archive 10 stale .ciagent/ root files + 1 consumer file (compression
  of pre-execution artifacts, verifications, evidence, the dated
  CAPABILITY_INVENTORY, AUTONOMY_THESIS, COST).
- Fix 3 stale-but-kept files (PROJECT.md, ROADMAP.md phase-status
  blocks; archive README contents tables).
- Wire STATE.md into the P-final ship discipline (PLAN.md, ROADMAP.md,
  NORTH_STAR.md).

The first file the PO reads before writing a new REQ-NNN spec.

---ci---
project: acdl
phase: 0
milestone: v1.27
status: specify
---ci---

.ciagent/config.json

@@ -13,7 +13,7 @@
   ],
   "active_project": "acdl",
   "active_projects": ["acdl", "nova-blockchain-exchange"],
-  "active_milestone": "v1.26",
+  "active_milestone": "v1.27",
   "autonomy": {
     "level": "full",
     "escalation_hooks": ["deploy", "delete_data", "merge_to_main"],