docs(ship): v1.24 milestone checkpoint complete — v1.23.4 released (id 639)

---ci---
project: acdl
phase: 4
milestone: v1.24
status: complete
ship: v1.23.4 (gitea release id 639)
---/ci---

.ciagent/CHECKPOINT.json

@@ -4,7 +4,7 @@
   "milestone": "v1.24",
   "phase_role": "final",
   "attempts": 0,
-  "updated_at": "2026-08-12T02:45:00Z",
+  "updated_at": "2026-08-12T02:50:00Z",
   "project": "acdl",
   "milestone_complete": true,
   "tag": "v1.23.4",
@@ -17,8 +17,10 @@
       "v1.23.0": 635,
       "v1.23.1": 636,
       "v1.23.2": 637,
-      "v1.23.3": 638
+      "v1.23.3": 638,
+      "v1.23.4": 639
     },
+    "milestone_release_id": 639,
     "milestone_release_tag": "v1.23.4"
   },
   "tests": {
@@ -26,5 +28,5 @@
     "passed": 287,
     "failed": 0
   },
-  "notes": "v1.24 milestone complete. Tag v1.23.4 (milestone release). 15 requirements complete (REQ-276..290). 4 phases (P0 pre-execution + P1 docs + P2 feat + P3 tests + P4 final). 287 tests pass. Consumer guide accuracy fixes + env-transition detect-and-destroy (no orphan path)."
+  "notes": "v1.24 milestone complete. Tag v1.23.4 (milestone release, id 639). 15 requirements complete (REQ-276..290). 4 phases. 287 tests pass. Consumer guide accuracy fixes + env-transition detect-and-destroy (no orphan path). Next milestone starts fresh."
 }