refac: migration crash, real-database tests, site deleted during create, ruels out of the repo, lists

docs/development.md

@@ -75,7 +75,7 @@ task clean           # remove bin/, tmp/ and the built SPA
 - A few tests open a real SQLite file in a temporary directory (the chunked id lookups, the slug backfill and the `?seo=` measurement). They never touch the real database.
 - The tests that need a real MySQL, MariaDB or PostgreSQL server skip themselves when `RENEWCMS_TEST_MYSQL_DSN` or `RENEWCMS_TEST_POSTGRES_DSN` is unset. No CI exists, so run them by hand before a release that touches the repositories:
   - `task test:mysql` runs `mysql:8.4` then `mariadb:11` in Docker, and `task test:postgres` runs `postgres:16` then `postgres:17`. Docker is required; the tasks start and remove the containers. Extra arguments go after `--`, for example `task test:postgres -- -run Postgres.*Chunked -v`.
-  - To use your own server on a scratch database: `RENEWCMS_TEST_MYSQL_DSN='user:pass@tcp(host:3306)/db' go test -tags nofrontend ./test/... -run MySQL -count=1`, or `RENEWCMS_TEST_POSTGRES_DSN='postgres://user:pass@host:5432/db?sslmode=disable' go test -tags nofrontend ./test/... -run Postgres -count=1`.
+  - To use your own server on a scratch database: `RENEWCMS_TEST_MYSQL_DSN='user:pass@tcp(host:3306)/db' go test -tags nofrontend ./test/... -run 'MySQL|TestLocalizationPersistence' -count=1`, or `RENEWCMS_TEST_POSTGRES_DSN='postgres://user:pass@host:5432/db?sslmode=disable' go test -tags nofrontend ./test/... -run 'Postgres|TestLocalizationPersistence' -count=1`. `TestLocalizationPersistence` runs one subtest per backend (`sqlite/…`, `mysql/…`, `postgres/…`), so it is part of both runs.
   - `TestMySQLChunkedLookups` and `TestPostgresChunkedLookups` check that the batched `IN` lookups of the article repository (500 ids per batch) return the same rows as SQLite.
 
 ## Visual check against the design