Refactor effectiveRevenueMonths calculation in qboConfig

- Updated the calculation of effectiveRevenueMonths in the qboConfig to ensure it handles non-finite values correctly. The new implementation uses a self-invoking function to parse the environment variable and defaults to 4 if the value is not a valid number.

This change improves the robustness of the configuration by preventing potential errors from invalid input.

Author: anatolyshipitz

workers/main/src/configs/qbo.ts

@@ -11,9 +11,11 @@ export const qboConfig = {
   tokenHost: 'https://oauth.platform.intuit.com',
   tokenPath: '/oauth2/v1/tokens/bearer',
   tokenExpirationWindowSeconds: 300,
-  effectiveRevenueMonths: parseInt(
-    process.env.QBO_EFFECTIVE_REVENUE_MONTHS || '4',
-  ),
+  effectiveRevenueMonths: (() => {
+    const raw = Number(process.env.QBO_EFFECTIVE_REVENUE_MONTHS);
+
+    return Number.isFinite(raw) ? Math.trunc(raw) : 4;
+  })(),
 };
 
 export const qboSchema = z.object({