feat: implement update-service v1 migration and enrollment flow

- added /update/enroll endpoint and enrollment logic
- migrated update client to v1 api endpoints and bearer auth
- implemented remote status reporting in backend and scripts
- updated requirements and project status

docs/architecture/openapi/schemas/status-report.yaml

@@ -0,0 +1,42 @@
+type: object
+required:
+  - project_id
+  - version
+  - status
+  - timestamp
+properties:
+  project_id:
+    type: string
+    example: demo
+  version:
+    type: string
+    example: 1.2.3
+  status:
+    type: string
+    enum: [success, failed, in_progress]
+    example: success
+  timestamp:
+    type: string
+    format: date-time
+    example: 2025-12-28T10:15:30Z
+  reason:
+    type: string
+    example: checksum_mismatch
+  client_id:
+    type: string
+    example: device-42
+  client_version:
+    type: string
+    example: 1.2.2
+  device_type:
+    type: string
+    example: kiosk
+  update_channel:
+    type: string
+    example: stable
+  duration_ms:
+    type: integer
+    example: 2450
+  error_code:
+    type: string
+    example: checksum_mismatch