refactor(migrations): remove PostgreSQL extensions (citext, pgcrypto, uuid-ossp)

- Replace pgcrypto/uuid-ossp with custom gen_random_uuid() SQL function
- Disable citext extension (replaced with VARCHAR + application-layer handling)
- Change account.name, account.email, api_key.name from citext to VARCHAR

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: narrowizard

api/src/data_sources/migrations/1653356327062-init-db.ts

@@ -2,8 +2,22 @@ import { MigrationInterface, QueryRunner } from 'typeorm';
 
 export class initDb1653356327062 implements MigrationInterface {
   public async up(queryRunner: QueryRunner): Promise<void> {
-    await queryRunner.query('CREATE EXTENSION IF NOT EXISTS "pgcrypto"');
-    await queryRunner.query('CREATE EXTENSION IF NOT EXISTS "uuid-ossp"');
+    await queryRunner.query(`
+      CREATE OR REPLACE FUNCTION public.gen_random_uuid()
+        RETURNS uuid
+        LANGUAGE sql
+        PARALLEL SAFE
+      AS $$
+        SELECT cast(
+          lpad(to_hex(floor(random() * 4294967296)::bigint), 8, '0') || '-' ||
+          lpad(to_hex(floor(random() * 65536)::int), 4, '0') || '-' ||
+          '4' || lpad(to_hex(floor(random() * 4096)::int), 3, '0') || '-' ||
+          substr('89ab', (floor(random() * 4) + 1)::int, 1) ||
+          lpad(to_hex(floor(random() * 4096)::int), 3, '0') || '-' ||
+          lpad(to_hex(floor(random() * 281474976710656)::bigint), 12, '0')
+        AS uuid);
+      $$;
+    `);
     await queryRunner.query(`
       CREATE OR REPLACE FUNCTION trigger_set_update_time() RETURNS TRIGGER AS $$
       BEGIN
@@ -16,7 +30,6 @@ export class initDb1653356327062 implements MigrationInterface {
 
   public async down(queryRunner: QueryRunner): Promise<void> {
     await queryRunner.query(`DROP FUNCTION IF EXISTS trigger_set_update_time()`);
-    await queryRunner.query(`DROP EXTENSION IF EXISTS "pgcrypto"`);
-    await queryRunner.query(`DROP EXTENSION IF EXISTS "uuid-ossp"`);
+    await queryRunner.query(`DROP FUNCTION IF EXISTS public.gen_random_uuid()`);
   }
 }

api/src/data_sources/migrations/1660005273691-add-extension-citext.ts

@@ -1,11 +1,12 @@
 import { MigrationInterface, QueryRunner } from 'typeorm';
 
+// Migration disabled - citext extension no longer needed
 export class addExtensionCitext1660005273691 implements MigrationInterface {
-  public async up(queryRunner: QueryRunner): Promise<void> {
-    await queryRunner.query(`CREATE EXTENSION IF NOT EXISTS citext`);
+  public async up(): Promise<void> {
+    // No-op: citext extension removed
   }
 
-  public async down(queryRunner: QueryRunner): Promise<void> {
-    await queryRunner.query(`DROP EXTENSION IF EXISTS citext`);
+  public async down(): Promise<void> {
+    // No-op
   }
 }

api/src/data_sources/migrations/1660005298185-create-users-table.ts

@@ -6,8 +6,8 @@ export class createUsersTable1660005298185 implements MigrationInterface {
       `CREATE TABLE account
         (
           id uuid NOT NULL DEFAULT gen_random_uuid(),
-          name citext NOT NULL,
-          email citext DEFAULT NULL,
+          name VARCHAR NOT NULL,
+          email VARCHAR DEFAULT NULL,
           password VARCHAR NOT NULL,
           role_id SMALLINT NOT NULL DEFAULT 10,
           create_time TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,

api/src/data_sources/migrations/1667183651604-create-api_keys-table.ts

@@ -6,7 +6,7 @@ export class createApiKeysTable1667183651604 implements MigrationInterface {
       `CREATE TABLE api_key
         (
           id uuid NOT NULL DEFAULT gen_random_uuid(),
-          name citext NOT NULL,
+          name VARCHAR NOT NULL,
           key VARCHAR NOT NULL,
           domain VARCHAR NOT NULL,
           role_id SMALLINT NOT NULL DEFAULT 10,