Update: 2026-07-09 01:01:15

backend/pricing-engine/src/index.ts

@@ -10,7 +10,7 @@
  * Cron integration: see crontab examples in package.json scripts
  */
 
-import { getMySQL, fetchSamples, saveFormulas, saveSurgeInsights, saveSurgeZones, closeConnections } from './db/connection';
+import { getMySQL, fetchSamples, saveFormulas, saveFormulaHistory, saveSurgeInsights, saveSurgeZones, closeConnections } from './db/connection';
 import { runAnalysis } from './analysis/engine';
 import { Pool, RowDataPacket } from 'mysql2/promise';
 
@@ -236,6 +236,19 @@ async function processCompetitor(
     if (peakHours.length > 0) {
       console.log(`      Peak hours stored: [${peakHours.join(', ')}]`);
     }
+
+    // لقطة insert-only لمحرك الثبات (drift detection) — لا تُستبدل أبداً
+    await saveFormulaHistory(pool, formulas.map(f => ({
+      competitorName: f.competitorName,
+      countryCode: f.countryCode,
+      tier: f.tier,
+      baseFare: f.baseFare,
+      kmRate: f.kmRate,
+      minRate: f.minRate,
+      minFare: f.minFare,
+      rSquared: f.rSquared,
+      sampleCount: f.sampleCount,
+    })));
   }
 
   // --- Save surge insights ---