chore: import DH V2 D5.6.4 production baseline

api-v3/src/database/data-source.ts

@@ -0,0 +1,34 @@
+import { join } from 'node:path';
+import { DataSource } from 'typeorm';
+import { PHASE_A_ENTITIES } from './entities';
+
+function requiredEnvironmentVariable(key: string): string {
+  const value = process.env[key];
+  if (!value) throw new Error(`Missing required environment variable: ${key}`);
+  return value;
+}
+
+function databasePort(): number {
+  const port = Number(process.env.DB_PORT ?? 5432);
+  if (!Number.isInteger(port) || port < 1 || port > 65535) {
+    throw new Error('DB_PORT must be a valid TCP port');
+  }
+  return port;
+}
+
+export const migrationDataSource = new DataSource({
+  type: 'postgres',
+  host: requiredEnvironmentVariable('DB_HOST'),
+  port: databasePort(),
+  database: requiredEnvironmentVariable('DB_NAME'),
+  username: requiredEnvironmentVariable('DB_MIGRATION_USER'),
+  password: requiredEnvironmentVariable('DB_MIGRATION_PASSWORD'),
+  entities: PHASE_A_ENTITIES,
+  migrations: [join(__dirname, 'migrations', '*.{js,ts}')],
+  migrationsTableName: 'typeorm_migrations',
+  synchronize: false,
+  migrationsRun: false,
+  logging: false,
+  applicationName: 'dhv2-migrations',
+  connectTimeoutMS: 5000,
+});