Speed up hitter profile chart lookups

src/matchups.js

@@ -2559,15 +2559,46 @@ export class MatchupService {
       return fallback;
     }
 
-    const result = await this.hosted.buildHostedHitterParityBase(options);
-    const hitterMatch = findBestPlayerMatch(result.rows, 'hitter_name', playerName);
+    const targetDate = parseDateOrToday(options.date);
+    const resolvedDate = await this.hosted.getLatestAvailableDate(targetDate);
+    if (!resolvedDate) {
+      throw new Error('No hosted hitter slate was available in the fallback window.');
+    }
+
+    const cacheKey = this.buildChartCacheKey('hitter-chart-base', { date: resolvedDate });
+    const base = await this.getCachedChartValue(cacheKey, async () => {
+      const [slateRows, hitterRows, pitcherRows, rosterRows] = await Promise.all([
+        this.hosted.readDailyFile(resolvedDate, 'slate.parquet', SLATE_COLUMNS),
+        this.hosted.readDailyFile(resolvedDate, 'daily_hitter_metrics.parquet', HITTER_COLUMNS),
+        this.hosted.readDailyFile(resolvedDate, 'daily_pitcher_metrics.parquet', PITCHER_COLUMNS),
+        this.hosted.readDailyFile(resolvedDate, 'rosters.parquet', ROSTER_COLUMNS).catch(() => []),
+      ]);
+      const rosterLookup = buildRosterLookup(rosterRows);
+      const pitcherLookup = new Map(
+        pitcherRows
+          .filter((row) => keepRowForDefaults(row))
+          .map((row) => [String(row.pitcher_id ?? row.player_id ?? ''), row])
+      );
+      const slateLookup = mapSlateTeams(slateRows);
+      for (const [team, slate] of slateLookup.entries()) {
+        const pitcher = pitcherLookup.get(String(slate.opposingPitcherId ?? ''));
+        if (pitcher?.p_throws) {
+          slateLookup.set(team, { ...slate, opposingPitcherHand: pitcher.p_throws });
+        }
+      }
+      return hitterRows
+        .filter((row) => keepRowForDefaults(row))
+        .map((row) => withDefaults(row, slateLookup, { rosterLookup, playerType: 'hitter' }));
+    });
+
+    const hitterMatch = findBestPlayerMatch(base, 'hitter_name', playerName);
     if (!hitterMatch) {
       throw new Error(`No hitter matchup profile matched "${playerName}".`);
     }
 
     return {
-      source: result.source,
-      resolvedDate: result.resolvedDate,
+      source: 'hosted',
+      resolvedDate,
       playerType: 'hitter',
       name: hitterMatch.hitter_name,
       team: hitterMatch.team ?? null,