feat(bat): 暴露翻译任务状态控制

Refs #43

internal/backendrpc/client.go

@@ -264,6 +264,15 @@ type ScheduleRunParams struct {
 	MaxRuns *uint64 `json:"max_runs,omitempty"`
 }
 
+// TranslationTaskUpdateParams is used by translation.task.update to persist
+// provider worker state for one task in the current official release.
+type TranslationTaskUpdateParams struct {
+	TaskID        string `json:"task_id"`
+	Status        string `json:"status"`
+	FailureReason string `json:"failure_reason,omitempty"`
+	ProviderRunID string `json:"provider_run_id,omitempty"`
+}
+
 // Ack is returned by accepted daemon control methods.
 type Ack struct {
 	Command       string `json:"command"`
@@ -483,6 +492,10 @@ func (c *Client) ScheduleRun(ctx context.Context, params ScheduleRunParams) (jso
 	return c.rawData(ctx, "schedule.run", params)
 }
 
+func (c *Client) TranslationTaskUpdate(ctx context.Context, params TranslationTaskUpdateParams) (json.RawMessage, error) {
+	return c.rawData(ctx, "translation.task.update", params)
+}
+
 func (c *Client) CatalogStatus(ctx context.Context) (json.RawMessage, error) {
 	return c.rawData(ctx, "catalog.status", nil)
 }