refactor(bruno): reorganize file structure from bruno-yaml to flat bruno directory

- Move all files from bruno-yaml/* to bruno/*
- Maintains existing directory structure within categories
- Updates bruno/user/auth files with OAuth2 refresh token flow
- Updates bruno/user/profile files for user profile management
- Adds bruno/dashboard/ directory with dashboard API tests
- Preserves all existing test scenarios and OpenCollection YAML format
- No functional changes - file reorganization only

bruno/queue/Get Queue Statistics.yml

@@ -0,0 +1,83 @@
+info:
+  name: Get Queue Statistics
+  type: http
+  seq: 9
+
+http:
+  method: GET
+  url: '{{base_url}}/api/queue/stats'
+  auth: inherit
+
+docs: |-
+  ## Get Queue Statistics
+
+  Retrieves overall queue performance and status metrics.
+
+  **Method:** GET
+
+  **Endpoint:** /api/queue/stats
+
+  **Authentication:** Required (Bearer token)
+
+  **Query Parameters:**
+  None (all stats returned)
+
+  **Response:**
+  - `overview` (object):
+    - `total_items` (integer): All items in queue
+    - `pending` (integer): Items awaiting processing
+    - `processing` (integer): Items currently being processed
+    - `completed` (integer): Successfully processed items
+    - `failed` (integer): Failed items
+  - `by_type` (object):
+    - `progress` (object): Progress item counts
+    - `note` (object): Note item counts
+    - `highlight` (object): Highlight item counts
+    - `bookmark` (object): Bookmark item counts
+  - `by_status` (object):
+    - `pending`: Count by type
+    - `processing`: Count by type
+    - `completed`: Count by type
+    - `failed`: Count by type
+  - `performance` (object):
+    - `avg_processing_time_ms` (number): Average processing duration
+    - `throughput_per_minute` (number): Items processed per minute
+    - `success_rate` (number): Percentage of successful processing
+    - `failure_rate` (number): Percentage of failures
+  - `timing` (object):
+    - `oldest_pending_age_seconds` (integer): Age of oldest pending item
+    - `longest_processing_time_ms` (integer): Longest current processing time
+    - `peak_queue_size_today` (integer): Maximum queue size today
+  - `devices` (array): Top 5 devices by queue activity
+    - `device_id` (string): Device UUID
+    - `device_name` (string): Device name
+    - `item_count` (integer): Items in queue from this device
+  - `retention` (object):
+    - `completed_items_30_days` (integer): Completed items in retention period
+    - `purge_scheduled_at` (string): Next auto-purge time
+  - `generated_at` (string): Statistics generation timestamp
+
+  **Status Codes:**
+  - 200: Success
+  - 401: Unauthorized
+
+  **Cache Behavior:**
+  - Statistics cached for 60 seconds
+  - Real-time data may vary slightly
+  - Use `?refresh=true` to bypass cache
+
+  **Use Cases:**
+  - Monitor queue health
+  - Identify performance bottlenecks
+  - Track processing capacity
+  - Alert on failures
+  - Capacity planning
+  - SLA monitoring
+  - Dashboard metrics
+
+  **Key Metrics to Watch:**
+  - **Success Rate:** Should be >95%
+  - **Avg Processing Time:** Depends on type
+  - **Oldest Pending:** Should be <5 minutes
+  - **Failed Items:** Investigate if >5%
+  - **Throughput:** Baseline for capacity planning