fix: preload player rating history to fix first-click chart render (#10)

src/services/player-service.js

@@ -1,5 +1,5 @@
 const { db } = require('../db');
-const { getPlayerFromDB, getRoundHistoryFromDB, savePredictedRatingToDB, savePlayerToDB, getMonthlyHistory, getAllMonthlyHistoriesFromDB } = require('../models/player');
+const { getPlayerFromDB, getRoundHistoryFromDB, savePredictedRatingToDB, savePlayerToDB, getMonthlyHistory, getAllMonthlyHistoriesFromDB, getAllRatingHistoriesFromDB } = require('../models/player');
 const { fetchPlayerDataHTTP, parsePlayerData } = require('../scrapers/player-http');
 const { calculatePredictedRating } = require('./rating-calculator');
 const logger = require('../logger');
@@ -167,6 +167,7 @@ async function getAllRatingsFromDB(progressCallback = null) {
 
     // Fetch all monthly histories in one query so the per-player loop doesn't add N extra queries
     const monthlyHistoryMap = await getAllMonthlyHistoriesFromDB(12);
+    const ratingHistoryMap = await getAllRatingHistoriesFromDB();
 
     const ratings = [];
     const total = allPlayers.length;
@@ -189,6 +190,14 @@ async function getAllRatingsFromDB(progressCallback = null) {
 
         if (playerData) {
           playerData.monthlyHistory = monthlyHistoryMap.get(pdgaNumber) ?? [];
+          const rawHistory = ratingHistoryMap.get(pdgaNumber) ?? [];
+          playerData.ratingHistory = rawHistory.map(row => ({
+            date: row.date,
+            rating: row.rating,
+            displayDate: new Date(row.date).toLocaleDateString('en-US', {
+              day: '2-digit', month: 'short', year: 'numeric'
+            })
+          }));
           // Re-derive now that history is attached — bulk path skipped includeMonthlyHistory
           const derived = deriveMonthlyDeltas(playerData.rating, player.rating_change, playerData.monthlyHistory);
           playerData.lastMonthRating = derived.lastMonthRating;
@@ -218,7 +227,8 @@ async function getAllRatingsFromDB(progressCallback = null) {
           stdDev: null,
           lastMonthRating: (errorRating != null && errorRatingChange != null) ? errorRating - errorRatingChange : null,
           deltaPredicted: null,
-          monthlyHistory: []
+          monthlyHistory: [],
+          ratingHistory: []
         };
         ratings.push(errorData);