docs(ship): clear checkpoint — v1.31 complete (release v1.30.2)

---ci---
project: acdl
phase: 1
milestone: v1.31
status: complete
ship: v1.30.2
---/ci---

.ciagent/CHECKPOINT.json

@@ -1,28 +1,27 @@
 {
   "phase": 1,
-  "stage": "verify",
+  "stage": "complete",
   "milestone": "v1.31",
-  "phase_role": "execution",
+  "phase_role": "final",
   "attempts": 0,
-  "updated_at": "2026-08-20T16:35:00Z",
+  "updated_at": "2026-08-20T16:45:00Z",
   "project": "acdl",
   "projects": ["acdl", "nova-blockchain-exchange"],
   "active_milestone": "v1.31",
-  "milestone_branch": "milestone/v1.31-leadership-deck-polish",
-  "phase_branch": "acdl/phase/01-deck-polish",
+  "milestone_branch": null,
+  "phase_branch": null,
   "tag_line": "v1.30.x",
   "phase_name": "deck-polish",
   "milestone_type": "nfr",
   "reqs_covered": ["REQ-373.1","REQ-373.2","REQ-373.3","REQ-373.4"],
   "reqs_partial": [],
-  "previous_milestone": {
-    "milestone": "v1.30",
-    "tag": "v1.29.5",
-    "complete": true,
-    "merged_to_main": "13ee34b",
+  "ship": {
+    "tag": "v1.30.2",
+    "release_ids": [822, 823],
+    "merged_to_main": true,
+    "merge_commit": "5a94c96",
     "branches_deleted": true,
-    "releases_created": true,
-    "release_ids": [811,813,814,818]
+    "local_only": false
   },
-  "notes": "v1.31 P1 VERIFY PASS. check_leadership_deck.sh: ALL CHECKS PASSED. (a) source exists, (b) slide count=7, (c) speaker-note word counts in band, (d) footer present, (e) only S&P theme colors, (f) PPTX exists. [1] citations confirmed on slides 3/5/7. Visible prose density enriched (slides 2-6: 43-67 -> 97-168 words). REQ-373.1..4 all complete."
+  "notes": "v1.31 MILESTONE COMPLETE. Refinement-only polish of v1.30 leadership deck. Tag v1.30.2 (milestone release). Merged to main 5a94c96, pushed. All milestone branches deleted (local-only; never pushed to remote per flat workflow). REQ-373.1..4 all complete. D-247 invariants preserved. 2 Gitea releases: 822 (P0 v1.30.1), 823 (P1 v1.30.2 = milestone release). Smoke test check_leadership_deck.sh PASS. Visible prose density raised (slides 2-6: 43-67 -> 97-168 visible words). Checkpoint cleared — next run starts a new milestone."
 }