C2(migrate-immich-to-ringtail): finalize chain — strip mikado frontmatter, add changelog

Immich is fully migrated off minikube-indri onto k3s-ringtail. All
six prerequisite cards plus the goal card converted to historical
documentation by removing status/branch/requires Mikado frontmatter.

Changelog fragment added at docs/changelog.d/migrate-immich-to-ringtail.infra.md.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/changelog.d/migrate-immich-to-ringtail.infra.md

@@ -0,0 +1,13 @@
+Move the entire Immich stack — server, machine-learning, valkey,
+and the PostgreSQL+VectorChord cluster — off `minikube-indri` and
+onto `k3s-ringtail`. Postgres data migrated zero-loss via CNPG
+`pg_basebackup` (replica catch-up then promote); row counts on
+`asset`, `user`, `album`, `smart_search`, `activity`, `asset_face`
+verified equal between source and replica before cutover. The ML
+pod now uses ringtail's RTX 4080 via the nvidia-device-plugin
+(time-slicing bumped 2 → 4 to share with frigate + ollama). Caddy
+routing at `photos.ops.eblu.me` is unchanged (still
+`photos.tail8d86e.ts.net`, the device just lives on ringtail now).
+Borgmatic backups continue against the same `immich-pg` tailnet
+hostname. First concrete chain in the broader indri-k8s
+decommission effort.

docs/how-to/immich/immich-app-on-ringtail.md

@@ -2,9 +2,6 @@
 title: Immich App on Ringtail
 modified: 2026-05-13
 last-reviewed: 2026-05-13
-requires:
-  - immich-pg-on-ringtail
-  - sifaka-nfs-from-ringtail
 tags:
   - how-to
   - operations

docs/how-to/immich/immich-cutover-and-decommission.md

@@ -2,9 +2,6 @@
 title: Immich Cutover and Decommission
 modified: 2026-05-13
 last-reviewed: 2026-05-13
-requires:
-  - immich-pg-data-migration
-  - immich-app-on-ringtail
 tags:
   - how-to
   - operations

docs/how-to/immich/immich-pg-data-migration.md

@@ -2,8 +2,6 @@
 title: Immich Postgres Data Migration
 modified: 2026-05-13
 last-reviewed: 2026-05-13
-requires:
-  - immich-pg-on-ringtail
 tags:
   - how-to
   - operations

docs/how-to/immich/immich-pg-on-ringtail.md

@@ -2,8 +2,6 @@
 title: Immich Postgres Cluster on Ringtail
 modified: 2026-05-13
 last-reviewed: 2026-05-13
-requires:
-  - cnpg-on-ringtail
 tags:
   - how-to
   - operations

docs/how-to/immich/migrate-immich-to-ringtail.md

@@ -2,15 +2,6 @@
 title: Migrate Immich to Ringtail
 modified: 2026-05-13
 last-reviewed: 2026-05-13
-status: active
-branch: mikado/migrate-immich-to-ringtail
-requires:
-  - cnpg-on-ringtail
-  - immich-pg-on-ringtail
-  - immich-pg-data-migration
-  - sifaka-nfs-from-ringtail
-  - immich-app-on-ringtail
-  - immich-cutover-and-decommission
 tags:
   - how-to
   - operations