Implement store credit tracking and enforcement

Introduced StoreCreditMovement entity and migration to track store credit usage and settlements. Updated payment flow to enforce credit limits and record credit movements. Modified outstanding balance calculation to use credit movements. Enhanced frontend to display real-time credit info and prevent over-credit payments. Updated API types, seed data, and DI registrations accordingly.

Distribution/Features/Store/StoreService.cs

@@ -1,12 +1,13 @@
 using Distribution.Features.Scheme;
 using Distribution.Features.Stock;
+using Distribution.Features.StoreCredit;
 using Distribution.Infra.Authorization;
 using Distribution.Infra.UoW;
 using Distribution.Models;
 
 namespace Distribution.Features.Store;
 
-public class StoreService(IStoreRepository repo, IUnitOfWork uow, ICurrentUserService currentUser, IScopeAccessService scopeAccess, SchemeService schemeService, Route.IRouteRepository routeRepo)
+public class StoreService(IStoreRepository repo, IUnitOfWork uow, ICurrentUserService currentUser, IScopeAccessService scopeAccess, SchemeService schemeService, Route.IRouteRepository routeRepo, IStoreCreditMovementRepository creditRepo)
 {
     private const int GlobalScopeRoleLevel = 50;
     private const int CreditApproverRoleLevel = 20;
@@ -167,7 +168,8 @@ public class StoreService(IStoreRepository repo, IUnitOfWork uow, ICurrentUserSe
         var store = await repo.GetByIdAsync(id);
         if (store is null || !store.IsActive) return null;
         if (!await HasStoreScopeAsync(id)) return null;
-        return new OutstandingBalanceResponse(store.Id, store.CreditLimit, store.OutstandingBalance, store.CreditLimit - store.OutstandingBalance);
+        var outstanding = await creditRepo.GetOutstandingForStoreAsync(id);
+        return new OutstandingBalanceResponse(store.Id, store.CreditLimit, outstanding, store.CreditLimit - outstanding);
     }
     public async Task<StoreResponse?> ClassifySegmentAsync(Guid id, ClassifySegmentRequest request, CancellationToken ct = default)
     {