Complete FrontOffice BFF to CMS Migration

- Migrated all 9 services from FrontOffice.BFF to CMS architecture
- Enhanced user.proto with 7 additional Customer API endpoints:
  * UpdateCustomerProfile, GetCustomerProfile
  * ChangeCustomerPassword with validation
  * GetCustomerReferrals with commission stats
  * UploadCustomerAvatar with file validation
  * GetCustomerSettings, UpdateCustomerSettings
- All services now support Customer endpoints with /Customer/ prefix
- Mock implementations with realistic Persian data
- Fixed namespace conflicts and compilation issues
- Comprehensive testing completed for all endpoints
- Services migrated: Categories, City, UserCarts, Products, UserWallet,
  Transaction, UserOrder, Package, User (enhanced)

src/CMSMicroservice.Application/HealthCQ/Queries/GetSystemHealth/GetSystemHealthResponseDto.cs

@@ -0,0 +1,35 @@
+namespace CMSMicroservice.Application.HealthCQ.Queries.GetSystemHealth;
+
+public class GetSystemHealthResponseDto
+{
+    public bool OverallHealthy { get; set; }
+    public List<ServiceHealthDto> Services { get; set; } = new();
+    public DateTime CheckedAt { get; set; }
+    public string Version { get; set; } = string.Empty;
+    public string Environment { get; set; } = string.Empty;
+}
+
+public class ServiceHealthDto
+{
+    public string ServiceName { get; set; } = string.Empty;
+    public HealthStatusDto Status { get; set; }
+    public string Description { get; set; } = string.Empty;
+    public long ResponseTimeMs { get; set; }
+    public DateTime LastCheck { get; set; }
+    public List<HealthDetailDto> Details { get; set; } = new();
+}
+
+public class HealthDetailDto
+{
+    public string Key { get; set; } = string.Empty;
+    public string Value { get; set; } = string.Empty;
+    public HealthStatusDto Status { get; set; }
+}
+
+public enum HealthStatusDto
+{
+    Unknown = 0,
+    Healthy = 1,
+    Degraded = 2,
+    Unhealthy = 3
+}