fix: 完善工作流公共接口上传与错误契约

- 区分 HTTP 请求标识与内部上传标识，补齐 Redis 旧记录兼容和关联日志

- 保持归一化 MIME 一致，并隔离工作流鉴权错误契约对其他公共接口的影响

- 收口 Multipart 操作日志与对象存储故障分类，归档范围：S05

easyflow-api/easyflow-api-public/src/test/java/tech/easyflow/publicapi/controller/PublicWorkflowControllerRoutingTest.java

@@ -112,6 +112,7 @@ public class PublicWorkflowControllerRoutingTest {
         when(multipartMapper.map(any()))
                 .thenReturn(Map.of("file", List.of()));
         when(uploadLifecycleService.prepare(
+                        anyString(),
                         eq("{}"),
                         anyMap(),
                         anyMap()))
@@ -181,6 +182,7 @@ public class PublicWorkflowControllerRoutingTest {
                 eq("{}"),
                 anyMap());
         verify(uploadLifecycleService, never()).prepare(
+                anyString(),
                 anyString(),
                 anyMap(),
                 anyMap());
@@ -209,12 +211,14 @@ public class PublicWorkflowControllerRoutingTest {
         mockMvc.perform(multipart(RUN_PATH)
                         .file(metadata)
                         .file(file)
-                        .header("ApiKey", "key"))
+                        .header("ApiKey", "key")
+                        .header("X-Request-Id", "request-multipart"))
                 .andExpect(status().isOk())
                 .andExpect(jsonPath("$.data").value("execute-1"));
 
         verify(multipartMapper).map(any());
         verify(uploadLifecycleService).prepare(
+                eq("request-multipart"),
                 eq("{}"),
                 anyMap(),
                 anyMap());