feat(database-lab): add local database test environments

deploy/database/RECIPE_TEMPLATE.md

@@ -0,0 +1,14 @@
+# Database Recipe Template
+
+Create `deploy/database/<product>/<version>/` with `recipe.json`, `compose.yaml`, and an `init/` directory. Set `defaultPort` in `recipe.json` to the native service port; the connection port and Compose `DB_PORT` fallback must both be `defaultPort + 1`.
+
+Every recipe must use a pinned image, default its host binding to `${DB_BIND_ADDRESS:-127.0.0.1}`, use the standard port plus one by default, set `container_name` to `dbx-<product>-<version>`, use password `123456`, and initialize database `dbx`. Redis-like services without named databases use DB 0 and the `dbx:` key prefix.
+
+Add both a non-interactive `smoke.steps` command and an interactive `shell` command to `recipe.json`, then run:
+
+```bash
+pnpm test:db-env
+make db-check
+make db-verify DB=<product>@<version>
+make db-reset DB=<product>@<version> CONFIRM=1
+```