Add Bruno API collection for device cap management

- Update User Max Devices - Complete API documentation
- Update User Max Devices - Success test case
- Update User Max Devices - Invalid Zero test case
- Update User Max Devices - Exceeds Maximum test case
- Update User Max Devices - Missing ID test case
- Include validation rules and example payloads
- Document all status codes and error responses

bruno/user/admin/Update User Max Devices.bru

@@ -0,0 +1,95 @@
+meta {
+  name: Update User Max Devices
+  type: http
+  seq: 6
+}
+
+put {
+  url: {{base_url}}/api/auth/users/{{user_id}}/max-devices
+  body: {
+    max_devices: {{max_devices}}
+  }
+  auth: inherit
+}
+
+settings {
+  encodeUrl: true
+  timeout: 0
+}
+
+docs {
+  ## Update User Max Devices (Admin)
+
+  Updates the maximum number of devices a user can register.
+
+  **Method:** PUT
+
+  **Endpoint:** /api/auth/users/:id/max-devices
+
+  **Authentication:** Required (Admin only)
+
+  **URL Parameters:**
+  - `id` (string): User ID (UUID)
+
+  **Request Body:**
+  ```json
+  {
+    "max_devices": 10
+  }
+  ```
+  - `max_devices` (integer, required): Maximum devices (1-100)
+
+  **Response:**
+  ```json
+  {
+    "message": "max devices updated"
+  }
+  ```
+
+  **Status Codes:**
+  - 200: Success
+  - 400: Invalid request (missing id, invalid max_devices, out of range)
+  - 401: Unauthorized
+  - 403: Forbidden (admin access required)
+  - 500: Internal server error
+
+  **Validation:**
+  - `max_devices` must be between 1 and 100
+  - User ID must be a valid UUID
+  - User must exist
+
+  **Features:**
+  - Admin-only endpoint for managing user device quotas
+  - Allows per-user device limits (default: 10)
+  - Prevents excessive device registrations per user
+  - Useful for multi-tenant or managed deployments
+
+  **Examples:**
+
+  Set max devices to 5:
+  ```json
+  {
+    "max_devices": 5
+  }
+  ```
+
+  Set max devices to 50 (premium user):
+  ```json
+  {
+    "max_devices": 50
+  }
+  ```
+
+  Set max devices to 1 (restricted user):
+  ```json
+  {
+    "max_devices": 1
+  }
+  ```
+
+  **Use Cases:**
+  - Restrict free-tier users to 5 devices
+  - Allow premium users up to 100 devices
+  - Reduce device cap for suspicious accounts
+  - Implement tiered device limits per user plan
+}