refactor(repo): consolidate openflare-server to root and move subprojects to internal/apps

- Merge all files inside openflare-server to the repository root directory.
- Relocate agent, relay, and flared subprojects from internal/ to internal/apps/.
- Combine docker-compose files and update build context paths to root.
- Update GitHub workflows and Dockerfiles to refer to new directories and package names.
- Rewrite Go package imports across all files.
- Resolve database renew test race condition and clean up docs.

frontend/lib/services/openflare/option.service.ts

@@ -0,0 +1,35 @@
+import {OpenFlareBaseService} from './base.service';
+import type {
+  DatabaseCleanupPayload,
+  DatabaseCleanupResult,
+  GeoIPLookupResult,
+  OptionBatchPayload,
+  OptionItem,
+} from './types';
+
+export class OptionService extends OpenFlareBaseService {
+  protected static override readonly basePath: string = '/api/v1/d/option';
+
+  static list(): Promise<OptionItem[]> {
+    return this.get<OptionItem[]>('/');
+  }
+
+  static update(key: string, value: string): Promise<void> {
+    return this.post<void>('/update', { key, value });
+  }
+
+  static updateBatch(options: OptionItem[]): Promise<void> {
+    const payload: OptionBatchPayload = { options };
+    return this.post<void>('/update-batch', payload);
+  }
+
+  static lookupGeoIP(provider: string, ip: string): Promise<GeoIPLookupResult> {
+    return this.post<GeoIPLookupResult>('/geoip/lookup', { provider, ip });
+  }
+
+  static cleanupDatabase(
+    payload: DatabaseCleanupPayload,
+  ): Promise<DatabaseCleanupResult> {
+    return this.post<DatabaseCleanupResult>('/database/cleanup', payload);
+  }
+}