Add lock files for package management and update architecture documentation

- Introduced bun.lock and package-lock.json to manage dependencies for the project.
- Enhanced backend API architecture documentation with additional security and documentation guidelines.
- Made minor formatting adjustments across various files for consistency and clarity.

backend-api/src/services/DebtCategoryService.ts

@@ -32,7 +32,7 @@ export class DebtCategoryService {
       {name: 'Auto Loans', description: 'Car and vehicle loans', color: '#10b981'},
       {name: 'Mortgages', description: 'Home mortgages', color: '#f59e0b'},
       {name: 'Personal Loans', description: 'Personal loan debts', color: '#8b5cf6'},
-      {name: 'Other', description: 'Other debt types', color: '#6b7280'},
+      {name: 'Other', description: 'Other debt types', color: '#6b7280'}
     ];
 
     const categories: DebtCategory[] = [];
@@ -43,8 +43,8 @@ export class DebtCategoryService {
         description: category.description,
         color: category.color,
         user: {
-          connect: {id: userId},
-        },
+          connect: {id: userId}
+        }
       });
       categories.push(created);
     }
@@ -69,8 +69,8 @@ export class DebtCategoryService {
       description: data.description,
       color: data.color,
       user: {
-        connect: {id: userId},
-      },
+        connect: {id: userId}
+      }
     });
   }