refactor(repo): replace legacy openflare-server with Wavelet rename

Delete the old monolithic openflare-server implementation and rename
Wavelet/ to openflare-server/ to complete the migration consolidation.
Update CI workflows, agent Dockerfiles, and deployment docs for the new
layout (frontend/, docker/Dockerfile).

openflare-server/frontend/lib/services/openflare/uptimekuma.service.ts

@@ -0,0 +1,9 @@
+import {OpenFlareBaseService} from './base.service';
+
+export class UptimeKumaService extends OpenFlareBaseService {
+  protected static override readonly basePath: string = '/api/v1/d/uptimekuma';
+
+  static sync(): Promise<void> {
+    return this.post<void>('/sync');
+  }
+}