feat(postgresql): Add schema filter for pg_dump and pg_restore

[leonardocouy]

Summary

Add an optional "Schemas" field to PostgreSQL database settings, allowing users to specify which schemas to include in backups and restores using a comma-separated list.

Motivation

When backing up managed PostgreSQL databases or databases with restricted internal schemas, the backup user may not have access to all schemas. This causes pg_dump to fail with permission errors like:

pg_dump: error: permission denied for schema internal_schema

By filtering backups to only include specific schemas (e.g., public), users can successfully backup their databases without permission errors.

My use case was to back up only the public and drizzle schemas from the Supabase DB, because this one doesn't allow backing up other internal schemas.

Changes

Backend

• Migration: Add schemas column to postgresql_databases table
• Model: Add Schemas field to PostgresqlDatabase struct
• Backup: Modify buildPgDumpArgs() to append --schema flags
• Restore: Modify pg_restore args to support --schema filtering

Frontend

• Add "Schemas" input field with tooltip in database edit form
• Display schemas in read-only database view
• Increase restore modal width to accommodate new field

Usage

Setting the Schemas field to public,custom_schema generates:

# Backup
pg_dump ... --schema public --schema custom_schema

# Restore
pg_restore ... --schema public --schema custom_schema

Leave the field empty for full database backup/restore (default behavior).

Screenshots

Schema field with tooltip when configuring backup

Schema field with tooltip in restore modal

Testing

• Tested backup with schema filtering
• Tested restore with schema filtering
• Frontend builds without errors
• Backend builds without errors

How to Test

If you'd like to test this feature, a pre-built Docker image is available:

docker pull leoflores/postgresus:latest

Then run it with your preferred configuration or build locally or replace the image in your existing Postgresus deployment.