ops: define clone-only verified legacy migration

docker-compose.migration.yml

@@ -0,0 +1,34 @@
+# Append after docker-compose.unraid.yml. Operator-only migration prerequisite;
+# every path must be a verified cold clone, never the original live data.
+# Also pass MIGRATION_ENV_FILE as Compose --env-file for interpolation parity.
+name: vacatureradar-managed
+services:
+  app:
+    labels:
+      io.itworx.migration-attempt: ${MIGRATION_ATTEMPT:?journaled migration attempt required}
+    image: ${MIGRATION_IMAGE:?set an attempt-specific candidate image}
+    env_file:
+      - ${VACATURERADAR_ENV_FILE:?set the protected external runtime env file}
+    build:
+      labels:
+        org.opencontainers.image.source: jens/vacatureradar
+        org.opencontainers.image.revision: ${MIGRATION_SOURCE_REVISION:?full verified Git commit required}
+        org.opencontainers.image.source-tree: ${MIGRATION_SOURCE_TREE:?verified Git tree required}
+        org.opencontainers.image.version: ${MIGRATION_BUILD_ID:?broker build ID required}
+        org.opencontainers.image.created: ${MIGRATION_BUILD_DATE:?broker UTC build date required}
+    volumes:
+      - type: bind
+        source: ${MIGRATION_LOCAL_ROOT:?verified cold clone of the complete local tree required}/media
+        target: /app/media
+        bind:
+          create_host_path: false
+      - type: bind
+        source: ${MIGRATION_LOCAL_ROOT:?verified cold clone of the complete local tree required}/logs
+        target: /app/logs
+        bind:
+          create_host_path: false
+      - type: bind
+        source: ${MIGRATION_LOCAL_ROOT:?verified cold clone of the complete local tree required}
+        target: /app/local
+        bind:
+          create_host_path: false