Task/filter out sectors with zero weight in Yahoo Finance data enhancer (#6895)

* Filter out sectors with zero weight

* Update changelog

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improved the pagination in the activities table of the account detail dialog
 - Improved the pagination in the activities table of the holding detail dialog
 - Randomized the placeholder in the assistant
+- Filtered out sectors with zero weight for ETF and mutual fund assets in the _Yahoo Finance_ data enhancer
 - Enabled the _Bull Dashboard_ in the admin control panel without requiring an environment variable (experimental)
 - Relaxed the URL validation in the asset profile DTOs to accept both `HTTP` and `HTTPS` protocols
 - Relaxed the URL validation in the platform DTOs to accept both `HTTP` and `HTTPS` protocols

apps/api/src/services/data-provider/data-enhancer/yahoo-finance/yahoo-finance.service.ts

@@ -218,15 +218,17 @@ export class YahooFinanceDataEnhancerService implements DataEnhancerInterface {
               };
             }) ?? [];
 
-        response.sectors = (
+        response.sectors = (assetProfile.topHoldings?.sectorWeightings ?? [])
-          assetProfile.topHoldings?.sectorWeightings ?? []
+          .flatMap((sectorWeighting) => {
-        ).flatMap((sectorWeighting) => {
             return Object.entries(sectorWeighting).map(([sector, weight]) => {
               return {
                 name: this.parseSector(sector),
                 weight: weight as number
               };
             });
+          })
+          .filter(({ weight }) => {
+            return weight > 0;
           });
       } else if (
         assetSubClass === 'STOCK' &&