feat: add service token rename command (#40)

* docs: preserve original issue 5 body

* feat: add service token rename command

* test: normalize rich option errors

app/services/auth_service.py

@@ -35,6 +35,12 @@ class IssuedServiceToken:
     auth_token: AuthToken
 
 
+@dataclass
+class RenamedServiceToken:
+    auth_token: AuthToken
+    changed: bool
+
+
 def get_auth_service_repository(settings: Settings = Depends(get_settings)) -> PortfolioRepository:
     return get_portfolio_repository_from_settings(settings)
 
@@ -130,6 +136,19 @@ class AuthService:
         raw_token, auth_token = self._repository.rotate_service_token(name)
         return IssuedServiceToken(token=raw_token, auth_token=auth_token)
 
+    def rename_service_token(self, name: str, new_name: str) -> RenamedServiceToken:
+        if name == new_name:
+            existing = self._repository.get_service_token_by_name(name)
+            if existing is None:
+                raise ValueError(f"서비스 토큰을 찾을 수 없습니다: {name}")
+            return RenamedServiceToken(auth_token=existing, changed=False)
+
+        try:
+            renamed = self._repository.rename_service_token(name, new_name)
+        except psycopg.errors.UniqueViolation as exc:
+            raise ValueError(f"이미 존재하는 서비스 토큰 이름입니다: {new_name}") from exc
+        return RenamedServiceToken(auth_token=renamed, changed=True)
+
     def rebind_service_token(self, name: str, daemon_id: str) -> tuple[str | None, AuthToken]:
         existing = self._repository.get_service_token_by_name(name)
         if existing is None: