refactor for clarity (no logic changes)

src/services/AbsurdSqlDatabaseService.ts

@@ -107,16 +107,9 @@ class AbsurdSqlDatabaseService implements DatabaseService {
     const extractMigrationNames: (result: QueryExecResult[]) => Set<string> = (
       result,
     ) => {
-      const queryResult = result as QueryExecResult[];
       // Even with the "select name" query, the QueryExecResult may be [] (which doesn't make sense to me).
-      if (queryResult.length > 0) {
-        const singleResult = queryResult[0];
-        const executedMigrations: Set<string> = new Set(
-          singleResult.values.map((row) => row[0] as string),
-        );
-        return executedMigrations;
-      }
-      return new Set();
+      const names = result?.[0]?.values.map((row) => row[0] as string) || [];
+      return new Set(names);
     };
 
     // Run migrations