feat(db): add rent_payment_destinations column and multi-schema support

- Add migration 0020 for rent_payment_destinations jsonb column
- Add DB_SCHEMA env var support for multi-schema deployments
- Create custom migrate.ts script with proper search_path handling
- Update drizzle.config.ts and client.ts to use DB_SCHEMA
- Add db_schema variable to Terraform with dev=test/prod=public defaults
- Update CD workflow to set DB_SCHEMA based on branch

packages/db/drizzle.config.ts

@@ -1,14 +1,14 @@
 import { defineConfig } from 'drizzle-kit'
 
-const dbCredentials = process.env.DATABASE_URL
-  ? {
-      url: process.env.DATABASE_URL
-    }
-  : undefined
-
 export default defineConfig({
   dialect: 'postgresql',
   schema: './packages/db/src/schema.ts',
   out: './packages/db/drizzle',
-  dbCredentials
+  dbCredentials: {
+    url: process.env.DATABASE_URL!
+  },
+  migrations: {
+    schema: process.env.DB_SCHEMA || 'public',
+    table: '__drizzle_migrations'
+  }
 })