feat(admin): 新增档案回流接口 POST /api/public/backflow

进销存软件可用公开 API Key(og_live_) 批量回流未收录商品,进入现有审核
队列,审核通过后收录。按 GTIN 去重(已收录跳过 exists,已有待审跳过
duplicate),来源标记 source=backflow,在后台队列与公众投稿区分。

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

api/internal/adminstore/submission.go

@@ -40,6 +40,10 @@ type SubmissionInput struct {
 	SubmitterName    *string           `json:"submitter_name"`
 	SubmitterContact *string           `json:"submitter_contact"`
 	Note             *string           `json:"note"`
+	// Source tags the origin of the submission, stored inside the payload so no
+	// schema change is needed. Empty means the default public contribution
+	// ("community"); "backflow" marks records pushed by inventory software.
+	Source *string `json:"source,omitempty"`
 }
 
 // SubmissionRow is a queue-list row for the admin review table.
@@ -49,6 +53,7 @@ type SubmissionRow struct {
 	Name          string  `json:"name"`
 	Status        string  `json:"status"`
 	SubmitterName *string `json:"submitter_name"`
+	Source        *string `json:"source"`
 	Matched       bool    `json:"matched"`
 	CreatedAt     string  `json:"created_at"`
 	ReviewedAt    *string `json:"reviewed_at"`
@@ -129,8 +134,8 @@ func (s *Store) ListSubmissions(ctx context.Context, status string, limit, offse
 
 	args = append(args, limit, offset)
 	sql := `
-SELECT id, gtin, name, status, submitter_name, (target_product_id IS NOT NULL),
-       created_at, reviewed_at
+SELECT id, gtin, name, status, submitter_name, NULLIF(payload->>'source',''),
+       (target_product_id IS NOT NULL), created_at, reviewed_at
 FROM submission ` + where +
 		" ORDER BY (status='pending') DESC, created_at DESC LIMIT $" +
 		strconv.Itoa(len(args)-1) + " OFFSET $" + strconv.Itoa(len(args))
@@ -146,7 +151,7 @@ FROM submission ` + where +
 		var r SubmissionRow
 		var created time.Time
 		var reviewed *time.Time
-		if err := rows.Scan(&r.ID, &r.GTIN, &r.Name, &r.Status, &r.SubmitterName, &r.Matched, &created, &reviewed); err != nil {
+		if err := rows.Scan(&r.ID, &r.GTIN, &r.Name, &r.Status, &r.SubmitterName, &r.Source, &r.Matched, &created, &reviewed); err != nil {
 			return nil, 0, err
 		}
 		r.CreatedAt = created.Format(time.RFC3339)