fix: remove unused time import in task.go and fix deploy script

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

deploy_dev.sh

@@ -8,8 +8,8 @@ ssh ubuntu "
   cd /home/yoge/Dev/doc_ai_backed &&
   git checkout $BRANCH &&
   git pull origin $BRANCH &&
-  docker compose -f docker-compose.infra.yml up -d &&
+  docker compose -f docker-compose.infra.yml up -d --no-recreate || true &&
   docker compose down &&
-  docker image rm doc_ai_backed-doc_ai:latest &&
+  docker image rm doc_ai_backed-doc_ai:latest || true &&
   docker compose up -d
 "

internal/service/task.go

@@ -9,7 +9,6 @@ import (
 	"io"
 	"net/http"
 	"strings"
-	"time"
 
 	"gitea.com/texpixel/document_ai/internal/model/task"
 	"gitea.com/texpixel/document_ai/internal/storage/dao"