refactor: archive 12 dead gRPC RPCs with [ARCHIVED] markers

Archived RPCs (code preserved, marked obsolete):
- fms.proto: excluded from csproj (CreateNewFileInfo, DeleteFileInfo)
- UserOrderService: GetOrdersByDateRange, CreateNewOrderForCustomer, SubmitOrderForCustomer
- ConfigurationService: DeactivateConfiguration, GetConfigurationHistory
- CityService: UpdateCity, DeleteCity
- HealthService: GetServiceHealth
- CategoryService: GetCategoryByIdForCustomer
- inventory.proto: BulkAdjustStock (no implementation existed)

All archived RPCs wrapped in #region [ARCHIVED] with [Obsolete] attributes.
No code deleted — archive only. Build passes with 0 errors.

src/CMSMicroservice.WebApi/Services/ConfigurationService.cs

@@ -154,18 +154,22 @@ public class ConfigurationService : ConfigurationContract.ConfigurationContractB
         throw new RpcException(new Status(StatusCode.FailedPrecondition, "تنظیمات سیستم فقط خواندنی هستند. تغییر از طریق کد انجام می‌شود"));
     }
 
+    #region [ARCHIVED] DeactivateConfiguration & GetConfigurationHistory — SystemConstants ثابت هستند، این RPCها بی‌معنی
     [RequiresPermission(PermissionNames.SettingsManageConfiguration)]
+    [Obsolete("ARCHIVED: SystemConstants are read-only — deactivation is meaningless")]
     public override Task<Empty> DeactivateConfiguration(DeactivateConfigurationRequest request, ServerCallContext context)
     {
-        _logger.LogWarning("DeactivateConfiguration called but SystemConstants are read-only. Key: {Key}", request.Key);
+        _logger.LogWarning("[ARCHIVED] DeactivateConfiguration called but SystemConstants are read-only. Key: {Key}", request.Key);
         throw new RpcException(new Status(StatusCode.FailedPrecondition, "تنظیمات سیستم فقط خواندنی هستند. غیرفعال‌سازی از طریق کد انجام می‌شود"));
     }
 
+    [Obsolete("ARCHIVED: SystemConstants have no history — always returns empty")]
     public override Task<GetConfigurationHistoryResponse> GetConfigurationHistory(GetConfigurationHistoryRequest request, ServerCallContext context)
     {
-        // چون constant هستند، تاریخچه‌ای وجود نداره
+        // [ARCHIVED] چون constant هستند، تاریخچه‌ای وجود نداره
         return Task.FromResult(new GetConfigurationHistoryResponse());
     }
+    #endregion
 
     #region Private Helpers