NPA-5880: Updated postman collection and OAS

Author: ClarksonAdam

postman/INT.postman_environment.json

@@ -32,12 +32,6 @@
 			"type": "secret",
 			"enabled": true
 		},
-		{
-			"key": "rp_app_auth_header_value",
-			"value": "",
-			"type": "secret",
-			"enabled": true
-		},
 		{
 			"key": "consent_app_auth_header_value",
 			"value": "",
@@ -70,6 +64,6 @@
 		}
 	],
 	"_postman_variable_scope": "environment",
-	"_postman_exported_at": "2025-12-01T15:43:51.791Z",
+	"_postman_exported_at": "2025-12-01T17:15:19.423Z",
 	"_postman_exported_using": "Postman/11.68.4"
-}
+}