fix: add PrismaPg adapter for PostgreSQL and fix GRANT statements

e2e/global.teardown.ts

@@ -8,6 +8,7 @@
 
 import { type FullConfig } from '@playwright/test';
 import { PrismaClient } from '@prisma/client';
+import { PrismaPg } from '@prisma/adapter-pg';
 import { execSync } from 'child_process';
 
 const TEST_PATTERNS = {
@@ -61,6 +62,13 @@ function buildEmailLikeClause(patterns: string[]): string {
   return patterns.map(p => `email LIKE '${p}'`).join(' OR ');
 }
 
+function createPrismaClient() {
+  const databaseUrl = process.env.DATABASE_URL;
+  if (!databaseUrl) throw new Error('DATABASE_URL is required');
+  const adapter = new PrismaPg({ connectionString: databaseUrl });
+  return new PrismaClient({ adapter });
+}
+
 async function resetDatabaseSchema(prisma: PrismaClient) {
   console.log('Resetting database schema...');
   
@@ -73,8 +81,6 @@ async function resetDatabaseSchema(prisma: PrismaClient) {
     await prisma.$executeRawUnsafe(`
       DROP SCHEMA public CASCADE;
       CREATE SCHEMA public;
-      GRANT ALL ON SCHEMA public TO postgres;
-      GRANT ALL ON SCHEMA public TO public;
     `);
     console.log(`Dropped ${tables.length} tables`);
   }
@@ -109,16 +115,16 @@ export default async function globalTeardown(config: FullConfig) {
   
   if (isCIDatabase()) {
     console.log('CI environment - resetting database schema');
-    const prisma = new PrismaClient();
+    const prisma = createPrismaClient();
     await resetDatabaseSchema(prisma);
     await prisma.$disconnect();
   } else if (isProductionDatabase()) {
     console.log('Production environment - selective cleanup of test records');
-    const prisma = new PrismaClient();
+    const prisma = createPrismaClient();
     await cleanupTestRecords(prisma);
   } else {
     console.log('Development environment - selective cleanup of test records');
-    const prisma = new PrismaClient();
+    const prisma = createPrismaClient();
     await cleanupTestRecords(prisma);
   }