feat: seed superadmin user on fresh deploy

packages/admin-db/prisma/migrations/20260415080000_seed_superadmin/migration.sql

@@ -0,0 +1,14 @@
+-- Seed the platform superadmin user
+-- Password: SuperAdmin@123 (bcrypt hash)
+INSERT INTO "super_admins" ("id", "email", "password", "firstName", "lastName", "isActive", "createdAt", "updatedAt")
+VALUES (
+  gen_random_uuid(),
+  'superadmin@fiberops.dev',
+  '$2b$12$wiW.foGm.5MD6FNz/HmBvuPaXJS56YPxxq5OEVCO6UXLOxTMvxL8S',
+  'Super',
+  'Admin',
+  true,
+  NOW(),
+  NOW()
+)
+ON CONFLICT ("email") DO NOTHING;