Rebuild: a dedicated Postgres for development (its own database, as in production)

The shared database's public schema leaked the old indexer's tables into
the generated schema.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

start/env.ts

@@ -32,7 +32,6 @@ export default await Env.create(new URL('../', import.meta.url), {
   DB_PASSWORD: Env.schema.string.optional(),
   DB_DATABASE: Env.schema.string(),
   DB_POOL_MAX: Env.schema.number.optional(),
-  DB_SEARCH_PATH: Env.schema.string.optional(),
   // Tablespace for the chunk store (the HDD on homelab).
   CHUNK_TABLESPACE: Env.schema.string.optional(),
   DB_DEBUG: Env.schema.boolean.optional(),