feat(api): add synthetic activities into calculator

apps/api/src/app/portfolio/portfolio.service.ts

@@ -575,6 +575,7 @@ export class PortfolioService {
       (user.settings?.settings as UserSettings)?.emergencyFund ?? 0
     );
 
+    // Activities for non-cash assets
     const { activities } =
       await this.orderService.getOrdersForPortfolioCalculator({
         filters,
@@ -582,23 +583,29 @@ export class PortfolioService {
         userId
       });
 
-    const portfolioCalculator = this.calculatorFactory.createCalculator({
-      activities,
+    // Synthetic activities for cash
+    const cashDetails = await this.accountService.getCashDetails({
       filters,
       userId,
-      calculationType: this.getUserPerformanceCalculationType(user),
       currency: userCurrency
     });
+    const cashActivities = await this.getCashActivities({
+      cashDetails,
+      userCurrency,
+      userId
+    });
 
-    const { createdAt, currentValueInBaseCurrency, hasErrors, positions } =
-      await portfolioCalculator.getSnapshot();
-
-    const cashDetails = await this.accountService.getCashDetails({
+    const portfolioCalculator = this.calculatorFactory.createCalculator({
       filters,
       userId,
+      activities: [...activities, ...cashActivities],
+      calculationType: this.getUserPerformanceCalculationType(user),
       currency: userCurrency
     });
 
+    const { createdAt, currentValueInBaseCurrency, hasErrors, positions } =
+      await portfolioCalculator.getSnapshot();
+
     const holdings: PortfolioDetails['holdings'] = {};
 
     const totalValueInBaseCurrency = currentValueInBaseCurrency.plus(