Finish architecture-cleanup RAILIANCE-WP-0016 T05

Item 13 is the restore RESOURCE-WP-0002 already proved. Item 14 retires
the dead Bitnami postgresql-ha deploy path and gates Valkey until a
consumer exists. Item 17 publishes the versioned S3 consumer-interface
index.

docs/postgresql-ha.md

@@ -1,9 +1,16 @@
-# PostgreSQL HA — Platform Service
+# PostgreSQL HA — retired
 
-**Chart:** `bitnami/postgresql-ha`
-**Namespace:** `platform`
-**Managed by:** `railiance-platform` (S3)
-**Workplan:** `RAIL-PL-WP-0001`
+**Status:** retired 2026-08-15 (`RAILIANCE-WP-0016` item 14)  
+**Superseded by:** CloudNativePG clusters in `databases` (`apps-pg`,
+`forgejo-db`, `platform-pg`, and the other CNPG instances).  
+**Do not deploy.** `make pg-deploy` is fail-closed.
+
+The Bitnami `postgresql-ha` (repmgr + pgpool) stack never ran as a live
+S3 service on railiance01. There is no `platform` namespace and no
+matching pods. Gitea’s historical subchart in S2 was replaced by
+`forgejo-db`. Keep this file as the retirement record and the
+pgpool-password incident note. New databases go through `docs/apps-pg.md`
+or `rapp-postgres`.
 
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