基准扩展 exhaustive（文档化）+ 12→0：枚举 switch 补显式 case（全部与现有 default 行为等价，fail-explicit 防未来枚举静默落入 default）；source_tasks.go 为控制复杂度合并两个等价校验条件。

Result: {"status":"keep","total_issues":8,"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_exhaustive":0,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":36}

internal/apps/upload/filesrv/file_server.go

@@ -134,6 +134,8 @@ func ServeUpload(c *gin.Context, upload *model.Upload) {
 			return
 		}
 		fallthrough
+	case fileTypeVideo, fileTypeAudio, fileTypeOther:
+		serveOriginalWithConditionalCheck(c, upload)
 	default:
 		serveOriginalWithConditionalCheck(c, upload)
 	}

internal/apps/upload/ingest/ingest.go

@@ -54,6 +54,8 @@ func ingestWithHashPolicy(ctx context.Context, req Request) (Result, error) {
 				return Result{}, ErrStorageReadOnly
 			}
 			return createDedupRecord(ctx, existing, req)
+		case PolicyCreate:
+			// 忽略已存在记录，走下方的新建流程。
 		}
 	}
 	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {