fix(ci): Fix FK constraint in seed script by making admin membership conditional

Problem:
- Seed script ran before server started, so admin user didn't exist yet
- Tried to create organization memberships with non-existent user ID
- PostgresError: FK constraint violation on member.user_id

Solution:
- Made adminUserId nullable (string | null)
- Skip membership creation if adminUserId is null
- Better Auth auto-adds user to default org on signup via API

Workflow:
1. Seed script creates organizations (no memberships)
2. CI workflow starts server
3. CI workflow calls Better Auth signup API
4. Better Auth creates user with correct password hash
5. Better Auth auto-adds user to default organization

Result:
- No FK constraint violations
- Password hashing guaranteed to match Better Auth format
- Organization membership created via Better Auth plugin

🤖 Generated with Claude Code

Author: mjunaidca

auth-server/scripts/seed-setup.ts

@@ -267,7 +267,7 @@ async function createAdminUser() {
 /**
  * Seed default organization (production + dev)
  */
-async function seedDefaultOrganization(adminUserId: string) {
+async function seedDefaultOrganization(adminUserId: string | null) {
   console.log("\n📊 Seeding default organization...\n");
 
   // Create or update default organization
@@ -294,35 +294,39 @@ async function seedDefaultOrganization(adminUserId: string) {
     });
   }
 
-  // Add admin user as owner
-  const existingMember = await db
-    .select()
-    .from(member)
-    .where(
-      and(
-        eq(member.userId, adminUserId),
-        eq(member.organizationId, DEFAULT_ORG_ID)
-      )
-    );
-
-  if (existingMember.length > 0) {
-    console.log(`  ✅ Admin already owner of ${DEFAULT_ORG_NAME}`);
+  // Add admin user as owner (only if user exists)
+  if (adminUserId) {
+    const existingMember = await db
+      .select()
+      .from(member)
+      .where(
+        and(
+          eq(member.userId, adminUserId),
+          eq(member.organizationId, DEFAULT_ORG_ID)
+        )
+      );
+
+    if (existingMember.length > 0) {
+      console.log(`  ✅ Admin already owner of ${DEFAULT_ORG_NAME}`);
+    } else {
+      console.log(`  ✅ Adding admin as owner`);
+      await db.insert(member).values({
+        id: `member-${adminUserId}-${DEFAULT_ORG_ID}`,
+        userId: adminUserId,
+        organizationId: DEFAULT_ORG_ID,
+        role: "owner",
+        createdAt: new Date(),
+      });
+    }
   } else {
-    console.log(`  ✅ Adding admin as owner`);
-    await db.insert(member).values({
-      id: `member-${adminUserId}-${DEFAULT_ORG_ID}`,
-      userId: adminUserId,
-      organizationId: DEFAULT_ORG_ID,
-      role: "owner",
-      createdAt: new Date(),
-    });
+    console.log(`  ⏭️  Skipping admin membership (user will be auto-added on signup)`);
   }
 }
 
 /**
  * Seed test organization (dev only)
  */
-async function seedTestOrganization(adminUserId: string) {
+async function seedTestOrganization(adminUserId: string | null) {
   console.log("\n📊 Seeding test organization...\n");
 
   // Create or update test organization
@@ -349,28 +353,32 @@ async function seedTestOrganization(adminUserId: string) {
     });
   }
 
-  // Add admin user as owner
-  const existingMember = await db
-    .select()
-    .from(member)
-    .where(
-      and(
-        eq(member.userId, adminUserId),
-        eq(member.organizationId, TEST_ORG.id)
-      )
-    );
-
-  if (existingMember.length > 0) {
-    console.log(`  ✅ Admin already member of ${TEST_ORG.name}`);
+  // Add admin user as owner (only if user exists)
+  if (adminUserId) {
+    const existingMember = await db
+      .select()
+      .from(member)
+      .where(
+        and(
+          eq(member.userId, adminUserId),
+          eq(member.organizationId, TEST_ORG.id)
+        )
+      );
+
+    if (existingMember.length > 0) {
+      console.log(`  ✅ Admin already member of ${TEST_ORG.name}`);
+    } else {
+      console.log(`  ✅ Adding admin as owner`);
+      await db.insert(member).values({
+        id: `member-${adminUserId}-${TEST_ORG.id}`,
+        userId: adminUserId,
+        organizationId: TEST_ORG.id,
+        role: "owner",
+        createdAt: new Date(),
+      });
+    }
   } else {
-    console.log(`  ✅ Adding admin as owner`);
-    await db.insert(member).values({
-      id: `member-${adminUserId}-${TEST_ORG.id}`,
-      userId: adminUserId,
-      organizationId: TEST_ORG.id,
-      role: "owner",
-      createdAt: new Date(),
-    });
+    console.log(`  ⏭️  Skipping admin membership (user will join via API)`);
   }
 }
 
@@ -417,7 +425,7 @@ async function seed() {
     .from(user)
     .where(eq(user.email, TEST_ADMIN_EMAIL));
 
-  let adminUserId: string;
+  let adminUserId: string | null = null;
   if (existingAdmin.length > 0) {
     adminUserId = existingAdmin[0].id;
     console.log(`  ✅ Admin user exists: ${TEST_ADMIN_EMAIL}`);
@@ -428,11 +436,7 @@ async function seed() {
     console.log(`     curl -X POST http://localhost:3001/api/auth/sign-up/email \\`);
     console.log(`       -H "Content-Type: application/json" \\`);
     console.log(`       -d '{"email":"${TEST_ADMIN_EMAIL}","password":"${TEST_ADMIN_PASSWORD}","name":"${TEST_ADMIN_NAME}"}'`);
-
-    // Create a placeholder user ID for organization membership
-    // The actual user will be created via API, but we need an ID now for the org setup
-    adminUserId = "admin-user-placeholder-id";
-    console.log(`  ⏭️  Using placeholder ID for organization setup`);
+    console.log(`  ℹ️  User will be auto-added to default organization on signup`);
   }
 
   // Seed default organization (ALWAYS - both dev and prod)