feat(pages): import deployment packages from URL

Add upload-from-url so admins can paste an HTTP(S) link and let the control
plane download the archive with browser-like headers. Private/LAN hosts and
insecure TLS certificates are allowed for internal artifact stores; package
size and format checks reuse the existing local-upload pipeline.

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

@@ -8,6 +8,7 @@ import { OpenFlareBaseService } from './base.service';
 import type {
   PagesDeployment,
   PagesDeploymentFile,
+  PagesDeploymentUploadFromURLPayload,
   PagesDeploymentUploadPayload,
   PagesProject,
   PagesProjectPayload,
@@ -67,6 +68,16 @@ export class PagesService extends OpenFlareBaseService {
     );
   }
 
+  static uploadDeploymentFromURL(
+    projectId: number,
+    payload: PagesDeploymentUploadFromURLPayload,
+  ): Promise<PagesDeployment> {
+    return this.post<PagesDeployment>(
+      `/${projectId}/deployments/upload-from-url`,
+      payload,
+    );
+  }
+
   static activateDeployment(
     projectId: number,
     deploymentId: number,

frontend/lib/services/openflare/types.ts

@@ -469,6 +469,10 @@ export interface PagesDeploymentUploadPayload {
   onProgress?: (percent: number) => void;
 }
 
+export interface PagesDeploymentUploadFromURLPayload {
+  url: string;
+}
+
 // ==================== Origins ====================
 
 export interface OriginItem {