fix(services): Fix service startup failures

- Remove duplicate CoreModule() calls from all service main.go files
  - NewContainer() already includes CoreModule() automatically
  - This was causing duplicate ConfigProvider provider errors

- Update all _fx.go files to use *database.Client instead of *ent.Client
  - database.Client embeds *ent.Client, so it can be used directly
  - This fixes type mismatches between providers and consumers
  - Keep ent import for constants like ent.Desc

- All services now build and should start successfully

cmd/authz-service/authz_service_fx.go

@@ -10,6 +10,7 @@ import (
 	authzv1 "git.dcentral.systems/toolz/goplt/api/proto/generated/authz/v1"
 	"git.dcentral.systems/toolz/goplt/internal/ent"
 	"git.dcentral.systems/toolz/goplt/internal/ent/userrole"
+	"git.dcentral.systems/toolz/goplt/internal/infra/database"
 	"git.dcentral.systems/toolz/goplt/pkg/config"
 	"git.dcentral.systems/toolz/goplt/pkg/logger"
 	"go.uber.org/fx"
@@ -24,7 +25,7 @@ import (
 
 // authzService provides authorization functionality.
 type authzService struct {
-	client *ent.Client
+	client *database.Client
 	logger logger.Logger
 }
 
@@ -231,7 +232,7 @@ func (s *authzServerImpl) GetUserRoles(ctx context.Context, req *authzv1.GetUser
 func provideAuthzService() fx.Option {
 	return fx.Options(
 		// Authz service
-		fx.Provide(func(client *ent.Client, log logger.Logger) (*authzService, error) {
+		fx.Provide(func(client *database.Client, log logger.Logger) (*authzService, error) {
 			return &authzService{
 				client: client,
 				logger: log,