Merge pull request #481 from beyondkmp/fix/remove-unsupported-openai-fields

fix: remove unsupported safety_identifier and previous_response_id fields from upstream requests

backend/internal/service/openai_gateway_service.go

@@ -846,12 +846,14 @@ func (s *OpenAIGatewayService) Forward(ctx context.Context, c *gin.Context, acco
 			}
 		}
 
-		// Remove prompt_cache_retention (not supported by upstream OpenAI API)
-		if _, has := reqBody["prompt_cache_retention"]; has {
-			delete(reqBody, "prompt_cache_retention")
+		// Remove unsupported fields (not supported by upstream OpenAI API)
+		for _, unsupportedField := range []string{"prompt_cache_retention", "safety_identifier", "previous_response_id"} {
+			if _, has := reqBody[unsupportedField]; has {
+				delete(reqBody, unsupportedField)
 				bodyModified = true
 			}
 		}
+	}
 
 	// Re-serialize body only if modified
 	if bodyModified {