CUST-WP-0051: artifact-store MinIO/STS lane finished (T05 progress)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

workplans/CUST-WP-0051-infrastructure-stabilization-metaplan.md

@@ -491,6 +491,24 @@ Progress 2026-06-30 policy-gate support closeout:
   `SECRETS-WP-0003` real npm publish, activity-core -> issue-core,
   artifact-store live MinIO/STS evidence, and Forgejo migration credentials.
 
+Progress 2026-07-02 artifact-store lane finished:
+
+- `ARTIFACT-STORE-WP-0007` is `finished`. D7.2 closed with a deterministic
+  local MinIO fixture (`make test-minio-local`) and a live compatibility pass;
+  D7.3 delivered `docs/sts-credential-vending-assessment.md` (key-cape first
+  issuer, Authelia rejected, no production object-storage consumers live yet);
+  D7.4 landed STS temporary-credential support (session token config/env ref,
+  per-client re-resolution of file refs, live MinIO `AssumeRole` proof through
+  tests and CLI health/verify); D7.5 routed the NetKingdom vending-service
+  follow-up (hub message `b57b3403`) and the open-cmis-tck
+  `reports/cmis-summary.md` producer gap (hub message `e5ba736d`), and closed
+  the decision: MinIO compatibility profile + STS, MaxIO fork deferred
+  indefinitely.
+- The T05 artifact-store bullet is complete. Remaining T05 lanes: issue-core
+  REST flip (waits on `CCR-2026-0002` approval + key injection), Forgejo
+  (human design decisions), `SECRETS-WP-0003` (parked behind provisioning and
+  publish approval).
+
 ## Task: Decide State Hub Migration Strategy
 
 ```task