Seeds a temp PGlite with representative cross-table data (users, teams,
team_members, conversations, messages), runs mosaic storage migrate-tier
against a live federated PG+pgvector profile, asserts exact row counts and
spot-checks key columns. Gated by FEDERATED_INTEGRATION=1.
Caught and fixed P0 bug in migrate-tier:
PostgresMigrationTarget passed Drizzle-selected camelCase keys
(emailVerified, userId, ...) verbatim as SQL identifiers, failing on
Postgres which expects snake_case. The 32 unit tests missed this because
both source and target were mocked. normaliseSourceRow now applies
toSnakeCase conversion that is idempotent on already-snake_case keys.
Test infrastructure:
- packages/storage/src/test-utils/pglite-with-vector.ts: PGlite +
@electric-sql/pglite/vector (JS-native pgvector) and migration runner.
Co-located with storage tests rather than exposed on @mosaicstack/db
public surface (would have polluted prod consumers with WASM bundle).
- packages/storage now declared "type": "module" (codebase convention,
required for import.meta.url in test-utils).
afterAll cleanup deletes prefix-namespaced rows even on test panic.
Refs #460
