fix: split workbench core mysql access

internal/store/ai.go

@@ -396,7 +396,11 @@ func (s *Store) SaveCompletedFileUpload(ctx context.Context, file CompletedFileU
 	if now.IsZero() {
 		now = time.Now().UTC().Round(time.Millisecond)
 	}
-	_, err := s.db.ExecContext(ctx, `INSERT INTO im_fileuploads
+	db := s.db
+	if s.core != nil && s.core.db != nil {
+		db = s.core.db
+	}
+	_, err := db.ExecContext(ctx, `INSERT INTO im_fileuploads
 		(tenant_id,id,createdat,updatedat,userid,status,mimetype,size,etag,location)
 		VALUES(?,?,?,?,?,?,?,?,?,?)`,
 		s.tenant(), file.ID, now, now, formatInt64(file.UserID), 1, file.MIMEType, file.Size, file.ETag, file.Location)

internal/store/mysql.go

@@ -172,10 +172,13 @@ func (s *Store) WorkbenchModules(ctx context.Context, userID int64) ([]Workbench
 }
 
 func (s *Store) MeetingUnreadCount(ctx context.Context, userID int64) (int, error) {
+	if s.core == nil || s.core.db == nil {
+		return 0, nil
+	}
 	var count int
 	query := fmt.Sprintf(`SELECT COUNT(*) FROM %s
 		WHERE tenant_id=? AND user_id=? AND read_at IS NULL AND event_type LIKE 'meeting.%%'`, tenantSystemNotificationsTable(s.tenant()))
-	err := s.db.GetContext(ctx, &count, query, s.tenant(), userID)
+	err := s.core.db.GetContext(ctx, &count, query, s.tenant(), userID)
 	if isMissingTable(err) {
 		return 0, nil
 	}