fix(db): reconcile schema snapshot with mt migration

Relay E2E builds the database from schema/schema.sql via pgschema apply, while the rewrite migration had moved the first-class community_id schema forward. The snapshot was still mostly pre-MT, so it produced unscoped tables such as channels(id) instead of channels(community_id, id).

Make the declarative snapshot match migrations/0001_initial_schema.sql exactly so the schema path and migration path create the same tenant-scoped shape.

Co-authored-by: Mari <95cae996907d7cab9f5dbf43c0f53edeac6ab0b032a6feae4abfd784e467b3f5@sprout-oss.stage.blox.sqprod.co>
Signed-off-by: tlongwell-block <109685178+tlongwell-block@users.noreply.github.com>

Author: tlongwell-block