Add validators and services for Product Galleries and Product Tags

- Implemented Create, Delete, Get, and Update validators for Product Galleries.
- Added Create, Delete, Get, and Update validators for Product Tags.
- Created service classes for handling Discount Categories, Discount Orders, Discount Products, Discount Shopping Cart, Product Categories, Product Galleries, and Product Tags.
- Each service class integrates with CQRS for command and query handling.
- Established mapping profiles for Product Galleries.

src/CMSMicroservice.Application/UserCQ/Commands/MigrateNetworkParentId/MigrateNetworkParentIdCommandHandler.cs

@@ -21,119 +21,17 @@ public class MigrateNetworkParentIdCommandHandler : IRequestHandler<MigrateNetwo
 
     public async Task<MigrateNetworkParentIdResult> Handle(MigrateNetworkParentIdCommand request, CancellationToken cancellationToken)
     {
-        _logger.LogInformation("=== Starting Manual ParentId → NetworkParentId Migration ===");
+        _logger.LogInformation("=== ParentId Migration No Longer Needed (ParentId Removed) ===");
         
-        var errors = new List<string>();
-
-        // Step 1: Check if already migrated
-        var alreadyMigrated = await _context.Users
-            .Where(u => u.ParentId != null && u.NetworkParentId != null)
-            .AnyAsync(cancellationToken);
-
-        if (alreadyMigrated)
-        {
-            _logger.LogWarning("⚠️ Migration already completed!");
-            return new MigrateNetworkParentIdResult
-            {
-                Success = false,
-                Message = "Migration already completed. All users with ParentId have NetworkParentId."
-            };
-        }
-
-        // Step 2: Find users to migrate
-        var usersToMigrate = await _context.Users
-            .Where(u => u.ParentId != null && u.NetworkParentId == null)
-            .OrderBy(u => u.Id)
-            .ToListAsync(cancellationToken);
-
-        if (usersToMigrate.Count == 0)
-        {
-            return new MigrateNetworkParentIdResult
-            {
-                Success = true,
-                Message = "No users to migrate. All done!"
-            };
-        }
-
-        // Step 3: Group by ParentId
-        var parentGroups = usersToMigrate.GroupBy(u => u.ParentId);
-
-        int migratedCount = 0;
-        int skippedCount = 0;
-
-        foreach (var group in parentGroups)
-        {
-            var parentId = group.Key;
-            var children = group.OrderBy(u => u.Id).ToList();
-
-            if (children.Count > 2)
-            {
-                var warning = $"Parent {parentId} has {children.Count} children! Taking first 2 only.";
-                _logger.LogWarning(warning);
-                errors.Add(warning);
-                
-                skippedCount += (children.Count - 2);
-                children = children.Take(2).ToList();
-            }
-
-            // Assign NetworkParentId and LegPosition
-            for (int i = 0; i < children.Count && i < 2; i++)
-            {
-                var child = children[i];
-                child.NetworkParentId = parentId;
-                child.LegPosition = i == 0 ? NetworkLeg.Left : NetworkLeg.Right;
-                migratedCount++;
-            }
-        }
-
-        // Step 4: Save changes
-        await _context.SaveChangesAsync(cancellationToken);
-
-        _logger.LogInformation("✅ Migration Completed! Migrated={Migrated}, Skipped={Skipped}", 
-            migratedCount, skippedCount);
-
-        // Step 5: Validate
-        await ValidateAsync(errors, cancellationToken);
-
+        // ParentId has been removed from User entity
+        // This migration is no longer necessary
         return new MigrateNetworkParentIdResult
         {
             Success = true,
-            MigratedCount = migratedCount,
-            SkippedCount = skippedCount,
-            ValidationErrors = errors,
-            Message = $"Migration completed successfully. Migrated: {migratedCount}, Skipped: {skippedCount}"
+            Message = "ParentId field has been removed. This migration is obsolete.",
+            MigratedCount = 0,
+            SkippedCount = 0,
+            ValidationErrors = new List<string>()
         };
     }
-
-    private async Task ValidateAsync(List<string> errors, CancellationToken cancellationToken)
-    {
-        // Check orphaned nodes
-        var orphanedUsers = await _context.Users
-            .Where(u => u.NetworkParentId != null && 
-                        !_context.Users.Any(p => p.Id == u.NetworkParentId))
-            .Select(u => u.Id)
-            .ToListAsync(cancellationToken);
-
-        if (orphanedUsers.Any())
-        {
-            var error = $"Found {orphanedUsers.Count} orphaned users: {string.Join(", ", orphanedUsers)}";
-            _logger.LogError(error);
-            errors.Add(error);
-        }
-
-        // Check binary tree violation
-        var parentsWithTooManyChildren = await _context.Users
-            .Where(u => u.NetworkParentId != null)
-            .GroupBy(u => u.NetworkParentId)
-            .Select(g => new { ParentId = g.Key, Count = g.Count() })
-            .Where(x => x.Count > 2)
-            .ToListAsync(cancellationToken);
-
-        if (parentsWithTooManyChildren.Any())
-        {
-            var error = $"Binary tree violation! {parentsWithTooManyChildren.Count} parents have >2 children";
-            _logger.LogError(error);
-            errors.Add(error);
-        }
-    }
 }