feat: support every song difficulty including Easy and Normal

scripts/collect-exact-charts.mjs

@@ -6,7 +6,7 @@ import { formulaScoreMetadata } from './song-score-formulas.mjs';
 const sourceOrigin = process.argv[2] ?? 'https://dreams.wf-calc.net';
 const outputDirectory = path.resolve('static/data/charts');
 const catalogPath = path.resolve('src/lib/data/exact-chart-catalog.json');
-const selectedDifficulties = new Set(['HARD', 'EXPERT']);
+const selectedDifficulties = new Set(['EASY', 'NORMAL', 'HARD', 'EXPERT']);
 const chartScoreWeightCoefficient = 0.3713416563352296;
 const scoreCalibrations = JSON.parse(await readFile(path.resolve('data/score-calibrations.json'), 'utf8'));
 const scoreCalibrationByKey = new Map(scoreCalibrations.charts.map((row) => [
@@ -219,7 +219,7 @@ for (const match of simulatorModule.matchAll(importPattern)) {
   if (selectedDifficulties.has(difficulty)) imports.push({ songId, difficulty, difficultyLevel, chartFile, assetFile });
 }
 
-if (imports.length === 0) throw new Error('수집할 Hard/Expert 채보 모듈을 찾지 못했습니다.');
+if (imports.length === 0) throw new Error('수집할 채보 모듈을 찾지 못했습니다.');
 await mkdir(outputDirectory, { recursive: true });
 
 let completed = 0;