Phase 1.5: EF Migration + Data Seed + Backfill

MIGRATION (AddPackageBasedSystem):
- Adds 11 new columns to Packages table
- Creates PackageFeatures table (Package×ClubFeature junction)
- Adds PackageId FK to: ClubMembershipCycles, WeeklyCommissionPools,
  UserCommissionPayouts, NetworkWeeklyBalances, UserWalletChangeLogs
- Adds First/LastActivationDate, First/LastPackageId to ClubMemberships
- Drops old unique indexes, creates new composite unique indexes:
  (WeekDef,Package), (User,WeekDef,Package)

DATA MIGRATION (embedded in EF migration):
1. Seeds Golden Package (Id=1): Price=56M, ActivationFee=25.2M,
   DiscountMultiplier=2.0, MagicWalletMultiplier=2.5, MaxBalancesPerLeg=300,
   MaxNetworkLevel=15, MagicWalletMaxDeposit=1B, MagicWalletMaxCredit=2.5B
2. Backfills PackageId=1 on all existing commission/network records
3. Backfills ClubMembership First/Last fields from existing ActivatedAt

FIXES:
- ClubMembership First/Last fields now nullable (DateTime?, long?)
  for backward compat with existing records
- UserPackagePurchaseConfiguration: .WithMany() → .WithMany(p => p.Purchases)
  to prevent shadow FK PackageId1

Build: 0 errors, 73 warnings

src/dbbkup/SeedGoldenPackageAndBackfill.sql

@@ -0,0 +1,90 @@
+-- =============================================
+-- Data Migration: Package-Based System
+-- Date: 2026-02-25
+-- Description: Seeds golden package and backfills 
+--   existing records with PackageId = 1
+-- NOTE: This is automatically executed in the EF Migration
+--   (AddPackageBasedSystem). This file is for reference only.
+-- =============================================
+
+USE [YourDatabaseName]; -- Replace with actual DB name
+GO
+
+-- 1. Seed Golden Package (Id=1)
+SET IDENTITY_INSERT [CMS].[Packages] ON;
+
+IF NOT EXISTS (SELECT 1 FROM [CMS].[Packages] WHERE [Id] = 1)
+BEGIN
+    INSERT INTO [CMS].[Packages] 
+        ([Id], [Title], [Description], [ImagePath], [Price],
+         [SortOrder], [IsActive], [IsBasePackage], 
+         [SupportsDayaPurchase], [SupportsDirectPurchase],
+         [ActivationFee], [DiscountMultiplier], [MagicWalletMultiplier],
+         [MaxBalancesPerLeg], [MaxNetworkLevel],
+         [MagicWalletMaxDeposit], [MagicWalletMaxCredit],
+         [Created], [IsDeleted])
+    VALUES 
+        (1, N'پکیج طلایی', N'پکیج اصلی باشگاه مشتریان کارا بازار سلامت', 
+         N'/images/packages/golden.png', 56000000,
+         1, 1, 1, 
+         1, 1,
+         25200000, 2.0, 2.5,
+         300, 15,
+         1000000000, 2500000000,
+         GETUTCDATE(), 0);
+    
+    PRINT 'Golden Package (Id=1) seeded successfully.';
+END
+ELSE
+BEGIN
+    PRINT 'Golden Package (Id=1) already exists. Skipping seed.';
+END
+
+SET IDENTITY_INSERT [CMS].[Packages] OFF;
+GO
+
+-- 2. Backfill PackageId on commission/network tables
+UPDATE [CMS].[WeeklyCommissionPools] SET [PackageId] = 1 WHERE [PackageId] = 0;
+PRINT CONCAT('WeeklyCommissionPools updated: ', @@ROWCOUNT, ' rows');
+
+UPDATE [CMS].[UserCommissionPayouts] SET [PackageId] = 1 WHERE [PackageId] = 0;
+PRINT CONCAT('UserCommissionPayouts updated: ', @@ROWCOUNT, ' rows');
+
+UPDATE [CMS].[NetworkWeeklyBalances] SET [PackageId] = 1 WHERE [PackageId] = 0;
+PRINT CONCAT('NetworkWeeklyBalances updated: ', @@ROWCOUNT, ' rows');
+
+UPDATE [CMS].[ClubMembershipCycles] SET [PackageId] = 1 WHERE [PackageId] = 0;
+PRINT CONCAT('ClubMembershipCycles updated: ', @@ROWCOUNT, ' rows');
+GO
+
+-- 3. Backfill ClubMembership First/Last Activation from existing ActivatedAt
+UPDATE cm SET 
+    cm.[FirstActivationDate] = cm.[ActivatedAt],
+    cm.[LastActivationDate] = cm.[ActivatedAt],
+    cm.[FirstPackageId] = 1,
+    cm.[LastPackageId] = 1
+FROM [CMS].[ClubMemberships] cm
+WHERE cm.[ActivatedAt] IS NOT NULL 
+  AND cm.[FirstActivationDate] IS NULL;
+
+PRINT CONCAT('ClubMemberships backfilled: ', @@ROWCOUNT, ' rows');
+GO
+
+-- 4. Verification Queries
+SELECT 'Packages' AS [Table], COUNT(*) AS [Total], 
+       SUM(CASE WHEN [IsBasePackage] = 1 THEN 1 ELSE 0 END) AS [BasePackages]
+FROM [CMS].[Packages] WHERE [IsDeleted] = 0;
+
+SELECT 'WeeklyCommissionPools' AS [Table], 
+       COUNT(*) AS [Total],
+       SUM(CASE WHEN [PackageId] = 0 THEN 1 ELSE 0 END) AS [MissingPackageId]
+FROM [CMS].[WeeklyCommissionPools] WHERE [IsDeleted] = 0;
+
+SELECT 'ClubMemberships' AS [Table],
+       COUNT(*) AS [Total],
+       SUM(CASE WHEN [FirstPackageId] IS NOT NULL THEN 1 ELSE 0 END) AS [WithFirstPackage],
+       SUM(CASE WHEN [LastActivationDate] IS NOT NULL THEN 1 ELSE 0 END) AS [WithLastActivation]
+FROM [CMS].[ClubMemberships] WHERE [IsDeleted] = 0;
+
+PRINT 'Data migration completed successfully.';
+GO