feat(data): rename *.Services projects, lift TrackEntity onto BlazorBlocks data layer, regenerate initial Postgres migration

DeepDrftWeb.Services → DeepDrftData; DeepDrftContent.Services → DeepDrftContent.Data.
TrackEntity:BaseEntity, TrackRepository:Repository<>, TrackManager:Manager<>+ITrackService.
Drops DeepDrftModels PagingParameters/PagedResult in favour of Models.Common.* from BlazorBlocks.
InitialCreate migration captures full schema including is_deleted index.

DeepDrftWeb.Client/Clients/TrackClient.cs

@@ -1,5 +1,5 @@
 using DeepDrftModels.Entities;
-using DeepDrftModels.Models;
+using Models.Common;
 using NetBlocks.Models;
 using System.Text.Json;
 using System.Web;

DeepDrftWeb.Client/Pages/TracksView.razor.cs

@@ -1,8 +1,8 @@
 using DeepDrftModels.Entities;
-using DeepDrftModels.Models;
 using DeepDrftWeb.Client.Services;
 using DeepDrftWeb.Client.ViewModels;
 using Microsoft.AspNetCore.Components;
+using Models.Common;
 
 namespace DeepDrftWeb.Client.Pages;
 

DeepDrftWeb.Client/ViewModels/TracksViewModel.cs

@@ -1,6 +1,6 @@
 using DeepDrftModels.Entities;
-using DeepDrftModels.Models;
 using DeepDrftWeb.Client.Clients;
+using Models.Common;
 
 namespace DeepDrftWeb.Client.ViewModels;