Fix OpenAPI validation by resolving duplicate content blocks

- Fixed all duplicate YAML content entries in both main and test files
- Reverted from OpenAPI 3.1 to 3.0.3 for GitHub Actions compatibility
- QueueItem now uses minItems/maxItems instead of prefixItems
- All endpoints now have proper response schema organization

openapi.yaml

@@ -1,4 +1,4 @@
-openapi: 3.1.0
+openapi: 3.0.3
 info:
   title: ComfyUI API
   description: 'API for ComfyUI - A powerful and modular UI for Stable Diffusion.
@@ -1126,21 +1126,23 @@ components:
         description: Additional metadata fields
     QueueItem:
       type: array
-      description: Queue item containing execution details as a tuple [position, prompt_id, prompt, extra_data, outputs_to_execute]
-      prefixItems:
-        - type: number
-          description: Queue position number (lower numbers have higher priority)
-        - type: string
-          format: uuid
-          description: Unique prompt identifier
-        - type: object
-          description: Workflow graph with nodes and connections
-          additionalProperties: true
-        - type: object
-          description: Extra metadata (auth tokens, client info, etc.)
-          additionalProperties: true
-        - type: array
-          description: Array of output node IDs
-          items:
-            type: string
-      items: false
+      description: Queue item containing execution details as a 5-element tuple [position, prompt_id, prompt, extra_data, outputs_to_execute]
+      minItems: 5
+      maxItems: 5
+      items:
+        oneOf:
+          - type: number
+            description: Queue position number (lower numbers have higher priority)
+          - type: string
+            format: uuid
+            description: Unique prompt identifier
+          - type: object
+            description: Workflow graph with nodes and connections
+            additionalProperties: true
+          - type: object
+            description: Extra metadata (auth tokens, client info, etc.)
+            additionalProperties: true
+          - type: array
+            description: Array of output node IDs
+            items:
+              type: string