Use i18n translation for regional market cluster risk category name

Replace the hardcoded 'Regional Market Cluster Risk' string in
getCategoryName() with a call to this.i18nService.getTranslation()
using the existing 'rule.regionalMarketClusterRisk.category' key.

This brings these five rules in line with how all other rule categories
(currency cluster risk, account cluster risk, asset class cluster risk,
etc.) already resolve their category names through the i18n service.

apps/api/src/models/rules/regional-market-cluster-risk/asia-pacific.ts

@@ -71,7 +71,10 @@ export class RegionalMarketClusterRiskAsiaPacific extends Rule<Settings> {
   }
 
   public getCategoryName() {
-    return 'Regional Market Cluster Risk'; // TODO: Replace hardcoded text with i18n translation
+    return this.i18nService.getTranslation({
+      id: 'rule.regionalMarketClusterRisk.category',
+      languageCode: this.getLanguageCode()
+    });
   }
 
   public getConfiguration() {

apps/api/src/models/rules/regional-market-cluster-risk/emerging-markets.ts

@@ -73,7 +73,10 @@ export class RegionalMarketClusterRiskEmergingMarkets extends Rule<Settings> {
   }
 
   public getCategoryName() {
-    return 'Regional Market Cluster Risk'; // TODO: Replace hardcoded text with i18n translation
+    return this.i18nService.getTranslation({
+      id: 'rule.regionalMarketClusterRisk.category',
+      languageCode: this.getLanguageCode()
+    });
   }
 
   public getConfiguration() {

apps/api/src/models/rules/regional-market-cluster-risk/europe.ts

@@ -71,7 +71,10 @@ export class RegionalMarketClusterRiskEurope extends Rule<Settings> {
   }
 
   public getCategoryName() {
-    return 'Regional Market Cluster Risk'; // TODO: Replace hardcoded text with i18n translation
+    return this.i18nService.getTranslation({
+      id: 'rule.regionalMarketClusterRisk.category',
+      languageCode: this.getLanguageCode()
+    });
   }
 
   public getConfiguration() {

apps/api/src/models/rules/regional-market-cluster-risk/japan.ts

@@ -71,7 +71,10 @@ export class RegionalMarketClusterRiskJapan extends Rule<Settings> {
   }
 
   public getCategoryName() {
-    return 'Regional Market Cluster Risk'; // TODO: Replace hardcoded text with i18n translation
+    return this.i18nService.getTranslation({
+      id: 'rule.regionalMarketClusterRisk.category',
+      languageCode: this.getLanguageCode()
+    });
   }
 
   public getConfiguration() {

apps/api/src/models/rules/regional-market-cluster-risk/north-america.ts

@@ -71,7 +71,10 @@ export class RegionalMarketClusterRiskNorthAmerica extends Rule<Settings> {
   }
 
   public getCategoryName() {
-    return 'Regional Market Cluster Risk'; // TODO: Replace hardcoded text with i18n translation
+    return this.i18nService.getTranslation({
+      id: 'rule.regionalMarketClusterRisk.category',
+      languageCode: this.getLanguageCode()
+    });
   }
 
   public getConfiguration() {