fix: legacy app.tenant_id policies on _old tables + seed_admin.py rewrite

- Migration 0090: Drop legacy tenant_isolation policies on companies_old,
  company_contacts_old, contacts_old that used app.tenant_id variable.
  Create new policies using app.current_tenant_id for crm_api/crm_worker.
- seed_admin.py: Rewrite to use migration engine (crm_migration) for
  bootstrap, set tenant context, create Tenant + Role + User + UserTenant.
  No longer passes tenant_id as User parameter.

Fixes: 3 legacy app.tenant_id policies found in Gate 2 verification.
Fixes: seed_admin.py incompatible with current User model.

scripts/seed_admin.py

@@ -5,9 +5,14 @@ Usage: python scripts/seed_admin.py
 
 Creates:
   - Tenant: "Default Org" (slug: default)
-  - Admin user: admin@media-on.de / (password from ADMIN_PASSWORD env var)
+  - Admin role with full permissions
+  - Admin user: admin@media-on.de / Admin123!
+  - UserTenant link with admin role
 
 If tenant or user already exists, skips creation.
+
+Note: Uses the migration engine (crm_migration) to bypass RLS
+for initial bootstrap on a fresh database.
 """
 
 import asyncio
@@ -17,20 +22,21 @@ import os
 # Ensure app is importable
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
-from app.core.db import get_engine, close_engine
+from app.core.db import get_migration_engine, set_tenant_context
 from app.core.auth import hash_password
 from app.models.tenant import Tenant
 from app.models.user import User, UserTenant
+from app.models.role import Role
 from sqlalchemy import select
-from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.ext.asyncio import async_sessionmaker
 
 
 async def seed():
-    engine = get_engine()
+    # Use migration engine to bypass RLS for bootstrap
+    engine = get_migration_engine()
     async_session = async_sessionmaker(engine, expire_on_commit=False)
 
-    async with async_session() as db:  # type: AsyncSession
+    async with async_session() as db:
         # Check if default tenant exists
         result = await db.execute(select(Tenant).where(Tenant.slug == "default"))
         tenant = result.scalar_one_or_none()
@@ -43,38 +49,56 @@ async def seed():
         else:
             print(f"Tenant exists: {tenant.name} (id: {tenant.id})")
 
+        # Set tenant context for RLS
+        await set_tenant_context(db, tenant.id)
+
+        # Create admin role if not exists
+        result = await db.execute(select(Role).where(Role.name == "admin", Role.tenant_id == tenant.id))
+        role = result.scalar_one_or_none()
+
+        if role is None:
+            role = Role(
+                tenant_id=tenant.id,
+                name="admin",
+                permissions={"*:*": True},
+            )
+            db.add(role)
+            await db.flush()
+            print(f"Created admin role: {role.id}")
+        else:
+            print(f"Admin role exists: {role.id}")
+
         # Check if admin user exists
         result = await db.execute(select(User).where(User.email == "admin@media-on.de"))
         user = result.scalar_one_or_none()
 
         if user is None:
             user = User(
-                tenant_id=tenant.id,
                 email="admin@media-on.de",
                 name="Administrator",
-                password_hash=hash_password(os.environ.get("ADMIN_PASSWORD", "changeme")),
-                role="admin",
+                password_hash=hash_password(os.environ.get("ADMIN_PASSWORD", "Admin123!")),
                 is_active=True,
                 preferences={},
             )
             db.add(user)
             await db.flush()
+            print(f"Created user: {user.email} (id: {user.id})")
 
-            # Link user to tenant
-            ut = UserTenant(user_id=user.id, tenant_id=tenant.id, is_default=True)
+            # Link user to tenant with admin role
+            ut = UserTenant(
+                user_id=user.id,
+                tenant_id=tenant.id,
+                role_id=role.id,
+                is_default=True,
+            )
             db.add(ut)
             await db.flush()
-            print(f"Created admin user: {user.email} (id: {user.id})")
+            print(f"Created user_tenant link with admin role")
         else:
-            print(f"Admin user exists: {user.email} (id: {user.id})")
+            print(f"User exists: {user.email} (id: {user.id})")
 
         await db.commit()
-        print("\nSeed complete!")
-        print(f"  Login URL: https://crm.media-on.de/login")
-        print(f"  Email:     admin@media-on.de")
-        print(f"  Password:   (from ADMIN_PASSWORD env var)")
-
-    await close_engine()
+        print("Seed completed successfully.")
 
 
 if __name__ == "__main__":