perf(storage): 极简化任务历史并增加保留治理

停止持久化 provider 原始响应、兼容响应快照、attempt/event/outbox 重复 JSON，并由标准任务结果动态生成 Kling/Keling/Volces 兼容响应。

增加事件去重与预算、极简 callback 投递、7/30 天分批清理、安全删除条件、并发迁移索引及可实际恢复的任务域排除备份。历史清理默认关闭，待兼容协议和异步恢复在线验证后单独启用。

验证：Go 全量测试与 go vet、PostgreSQL 18 集成与实际备份恢复、迁移安全测试、bash -n、ShellCheck、Compose 配置和人工发布脚本测试均通过。

apps/api/internal/clients/provider_task.go

@@ -340,24 +340,20 @@ func hasProviderTaskResult(result map[string]any) bool {
 	return result["data"] != nil || valueAtPath(result, "data.result") != nil || valueAtPath(result, "data.audio") != nil || valueAtPath(result, "output.image_urls") != nil || valueAtPath(result, "output.video_url") != nil || valueAtPath(result, "Response.ResultVideoUrl") != nil || valueAtPath(result, "Response.ResultImages") != nil || result["audio_url"] != nil || result["urls"] != nil
 }
 
-func normalizeProviderTaskResult(request Request, spec providerTaskSpec, result map[string]any, upstreamTaskID string) map[string]any {
-	out := cloneMapAny(result)
-	out["status"] = "success"
+func normalizeProviderTaskResult(request Request, _ providerTaskSpec, result map[string]any, upstreamTaskID string) map[string]any {
+	data, ok := result["data"].([]any)
+	if !ok {
+		data = providerTaskData(request, result)
+	}
+	out := map[string]any{
+		"status":  "success",
+		"created": time.Now().UnixMilli(),
+		"model":   request.Model,
+		"data":    data,
+	}
 	if upstreamTaskID != "" {
 		out["upstream_task_id"] = upstreamTaskID
 	}
-	if out["created"] == nil {
-		out["created"] = time.Now().UnixMilli()
-	}
-	if out["model"] == nil {
-		out["model"] = request.Model
-	}
-	if _, ok := out["data"].([]any); !ok {
-		if out["data"] != nil {
-			out["raw_data"] = out["data"]
-		}
-		out["data"] = providerTaskData(request, result)
-	}
 	return out
 }