fix: use unknown instead of any for error type in syncRegisteredSchemas

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>
Agent-Logs-Url: https://github.com/objectstack-ai/spec/sessions/a6a76ea8-5b90-40cb-88c8-26a9cb27cc6b

Author: Copilot

packages/objectql/src/plugin.ts

@@ -277,11 +277,11 @@ export class ObjectQLPlugin implements Plugin {
       try {
         await driver.syncSchema(obj.name, obj);
         synced++;
-      } catch (e: any) {
+      } catch (e: unknown) {
         ctx.logger.warn('Failed to sync schema for object', {
           object: obj.name,
           driver: driver.name,
-          error: e.message,
+          error: e instanceof Error ? e.message : String(e),
         });
       }
     }