fix(sqlite): Add missing rows.Err() checks after row iteration (#1141)

The scanIssues and scanIssuesWithDependencyType helper functions were
not checking rows.Err() after iterating through query results. This
could cause errors during iteration (connection drops, context
cancellation, etc.) to be silently ignored.

Per Go database/sql best practices, rows.Err() should always be checked
after a rows.Next() loop completes to catch any errors that occurred
during iteration.

Co-authored-by: Steven Syrek <steven.syrek@deepl.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

internal/storage/sqlite/dependencies.go

@@ -1039,6 +1039,11 @@ func (s *SQLiteStorage) scanIssues(ctx context.Context, rows *sql.Rows) ([]*type
 		issueIDs = append(issueIDs, issue.ID)
 	}
 
+	// Check for errors during iteration (e.g., connection issues, context cancellation)
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating issue rows: %w", err)
+	}
+
 	// Second pass: batch-load labels for all issues
 	labelsMap, err := s.GetLabelsForIssues(ctx, issueIDs)
 	if err != nil {
@@ -1180,5 +1185,10 @@ func (s *SQLiteStorage) scanIssuesWithDependencyType(ctx context.Context, rows *
 		results = append(results, result)
 	}
 
+	// Check for errors during iteration (e.g., connection issues, context cancellation)
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating issue rows with dependency type: %w", err)
+	}
+
 	return results, nil
 }