db(seo): 🗃️ Update SEO data-source connection settings and access patterns

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

features/seo/backend-api/src/database/data-source.ts

@@ -0,0 +1,48 @@
+import { join, dirname } from 'path';
+import { fileURLToPath } from 'url';
+import { readFileSync } from 'fs';
+
+import { DataSource } from 'typeorm';
+
+// Load .env file for CLI usage (NestJS ConfigModule handles this in-app)
+const envPath = join(dirname(fileURLToPath(import.meta.url)), '..', '..', '.env');
+try {
+  const envContent = readFileSync(envPath, 'utf-8');
+  for (const line of envContent.split('\n')) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith('#')) continue;
+    const eqIndex = trimmed.indexOf('=');
+    if (eqIndex === -1) continue;
+    const key = trimmed.slice(0, eqIndex);
+    const value = trimmed.slice(eqIndex + 1);
+    if (!process.env[key]) {
+      process.env[key] = value;
+    }
+  }
+} catch {
+  // .env file may not exist in CI/production
+}
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+/**
+ * TypeORM DataSource for migrations
+ *
+ * Usage:
+ *   bun run migration:run      - Run pending migrations
+ *   bun run migration:revert   - Revert last migration
+ *   bun run migration:generate - Generate new migration from entity diff
+ */
+export default new DataSource({
+  type: 'postgres',
+  host: process.env.DATABASE_HOST || 'localhost',
+  port: parseInt(process.env.DATABASE_PORT || '25432', 10),
+  username: process.env.DATABASE_POSTGRES_USER || 'lilith',
+  password: process.env.DATABASE_POSTGRES_PASSWORD || 'seo_dev',
+  database: process.env.DATABASE_POSTGRES_NAME || 'lilith_seo',
+  entities: [join(__dirname, 'entities/*.{ts,js}')],
+  migrations: [join(__dirname, 'migrations/*.{ts,js}')],
+  synchronize: false,
+  logging: true,
+});