feat: recognition job context, diary linkage, worker improvements

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

backend/internal/domain/recognition/job_repository.go

@@ -17,6 +17,7 @@ type JobRepository interface {
 	QueuePosition(ctx context.Context, userPlan string, createdAt time.Time) (int, error)
 	NotifyJobUpdate(ctx context.Context, jobID string) error
 	ListTodayUnlinked(ctx context.Context, userID string) ([]*JobSummary, error)
+	ListAll(ctx context.Context, userID string) ([]*JobSummary, error)
 }
 
 // PostgresJobRepository implements JobRepository using a pgxpool.
@@ -127,6 +128,46 @@ func (repository *PostgresJobRepository) NotifyJobUpdate(queryContext context.Co
 	return notifyError
 }
 
+// ListAll returns all recognition jobs for the given user, newest first.
+func (repository *PostgresJobRepository) ListAll(queryContext context.Context, userID string) ([]*JobSummary, error) {
+	rows, queryError := repository.pool.Query(queryContext,
+		`SELECT id, status, target_date::text, target_meal_type,
+		        result, error, created_at
+		 FROM dish_recognition_jobs
+		 WHERE user_id = $1
+		 ORDER BY created_at DESC`,
+		userID,
+	)
+	if queryError != nil {
+		return nil, queryError
+	}
+	defer rows.Close()
+
+	var summaries []*JobSummary
+	for rows.Next() {
+		var summary JobSummary
+		var resultJSON []byte
+		scanError := rows.Scan(
+			&summary.ID, &summary.Status, &summary.TargetDate, &summary.TargetMealType,
+			&resultJSON, &summary.Error, &summary.CreatedAt,
+		)
+		if scanError != nil {
+			return nil, scanError
+		}
+		if resultJSON != nil {
+			var dishResult ai.DishResult
+			if unmarshalError := json.Unmarshal(resultJSON, &dishResult); unmarshalError == nil {
+				summary.Result = &dishResult
+			}
+		}
+		summaries = append(summaries, &summary)
+	}
+	if rowsError := rows.Err(); rowsError != nil {
+		return nil, rowsError
+	}
+	return summaries, nil
+}
+
 // ListTodayUnlinked returns today's jobs for the given user that have not yet been
 // linked to any meal_diary entry.
 func (repository *PostgresJobRepository) ListTodayUnlinked(queryContext context.Context, userID string) ([]*JobSummary, error) {