Add name and data_dir to ConfigUpdate model

Allow updating app name and data directory via config endpoint.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/server/models/config.py

@@ -242,6 +242,8 @@ class AppConfig(BaseModel):
 
 
 class ConfigUpdate(BaseModel):
+    name: Optional[str] = None
+    data_dir: Optional[str] = None
     scheduler: Optional[SchedulerConfig] = None
     logging: Optional[LoggingConfig] = None
     backup: Optional[BackupConfig] = None