Auto-seed dev PocketBase and share its schema with the tests

compose.test.yaml

@@ -18,6 +18,14 @@ services:
     # lets Docker pick a random free one; the tests read it back with `compose port`.
     ports: !override
       - "8090"
+    # Drop the dev overlay's pb_migrations bind mount. The tests must NOT run the
+    # dev seed -- it would insert the dev data set, which the tests do not assert
+    # against (and which lacks the fixtures' draft page, known event time, etc.).
+    # The fixture creates the collections itself by importing the shared schema
+    # file, then seeds its own fixed records. !override replaces the inherited
+    # volumes list; the throwaway pb_data volume is re-declared so it survives.
+    volumes: !override
+      - pb_data_dev:/pb_data
 
   eb-web:
     container_name: !reset null   # see eb-pocketbase above (eb-web is not started in tests)