fix(openapi): remove duplicate cursor wrapping in pipelines and exporters responses

V2ListPipelinesResponse and V2ListExportersResponse had a nested cursor structure
(cursor.cursor.data) instead of the expected flat one (cursor.data). The responses
wrapped the CursorResponse schema in an extra cursor property with a redundant allOf,
while the referenced schemas already contained the cursor structure.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gfyrag

docs/api/README.md

@@ -2068,16 +2068,7 @@ components:
       content:
         application/json:
           schema:
-            type: object
-            properties:
-              cursor:
-                allOf:
-                  - $ref: "#/components/schemas/V2PipelinesCursorResponse"
-                  - properties:
-                      data:
-                        type: array
-                        items:
-                          $ref: "#/components/schemas/V2Pipeline"
+            $ref: "#/components/schemas/V2PipelinesCursorResponse"
 
     V2GetPipelineStateResponse:
       description: Pipeline information
@@ -2107,17 +2098,7 @@ components:
       content:
         application/json:
           schema:
-            type: object
-            properties:
-              cursor:
-                allOf:
-                  - $ref: "#/components/schemas/V2ExportersCursorResponse"
-                  - type: object
-                    properties:
-                      data:
-                        type: array
-                        items:
-                          $ref: "#/components/schemas/V2Exporter"
+            $ref: "#/components/schemas/V2ExportersCursorResponse"
 
     V2GetExporterStateResponse:
       description: Exporter information