refactor(bruno): migrate API tests to Bruno DSL format

- Convert all existing .bru files from JSON to Bruno DSL format
- Remove obsolete files (conflicts/api.bru, kobo/Kobo Initialization.bru)
- Update auth configuration to use 'inherit' instead of explicit bearer tokens
- Add comprehensive documentation to all test files
- Improve test scripts with proper assertions and error handling

bruno/queue/List All Queue Items (Admin).bru

@@ -7,32 +7,28 @@ meta {
 get {
   url: {{base_url}}/api/queue/items
   body: none
-  auth: bearer
-}
-
-headers: {
-  Authorization: Bearer {{token}}
+  auth: inherit
 }
 
 docs {
   ## List All Queue Items (Admin)
-  
+
   Retrieves all queue items across all devices (admin only).
-  
+
   **Method:** GET
-  
+
   **Endpoint:** /api/queue/items
-  
+
   **Authentication:** Bearer token (admin role required)
-  
+
   **Response:**
    - Array of queue items with device and status information
-  
+
   **Status Codes:**
    - 200: Success
    - 401: Unauthorized
    - 403: Forbidden - admin role required
-  
+
   **Example Response:**
    ```json
    [