Fix data purge FK violation on Appointments and apply pending migration

DataPurgeController was deleting Jobs without first clearing the nullable
Appointments.JobId FK, causing FK_Appointments_Jobs_JobId violations.
Fix nulls out the FK on any linked appointments before the DELETE runs.

Also applies migration AddAllowCustomFormulas (AllowCustomFormulas column
on SubscriptionPlanConfigs for custom formula pricing feature gating).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PowderCoating.Infrastructure/Migrations/20260525165521_AddAllowCustomFormulas.cs

@@ -0,0 +1,72 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace PowderCoating.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddAllowCustomFormulas : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "AllowCustomFormulas",
+                table: "SubscriptionPlanConfigs",
+                type: "bit",
+                nullable: false,
+                defaultValue: false);
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 1,
+                column: "CreatedAt",
+                value: new DateTime(2026, 5, 25, 16, 55, 17, 422, DateTimeKind.Utc).AddTicks(8290));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 2,
+                column: "CreatedAt",
+                value: new DateTime(2026, 5, 25, 16, 55, 17, 422, DateTimeKind.Utc).AddTicks(8297));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 3,
+                column: "CreatedAt",
+                value: new DateTime(2026, 5, 25, 16, 55, 17, 422, DateTimeKind.Utc).AddTicks(8298));
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "AllowCustomFormulas",
+                table: "SubscriptionPlanConfigs");
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 1,
+                column: "CreatedAt",
+                value: new DateTime(2026, 5, 24, 14, 36, 3, 317, DateTimeKind.Utc).AddTicks(8197));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 2,
+                column: "CreatedAt",
+                value: new DateTime(2026, 5, 24, 14, 36, 3, 317, DateTimeKind.Utc).AddTicks(8203));
+
+            migrationBuilder.UpdateData(
+                table: "PricingTiers",
+                keyColumn: "Id",
+                keyValue: 3,
+                column: "CreatedAt",
+                value: new DateTime(2026, 5, 24, 14, 36, 3, 317, DateTimeKind.Utc).AddTicks(8204));
+        }
+    }
+}

src/PowderCoating.Infrastructure/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -6796,7 +6796,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 1,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 5, 24, 14, 36, 3, 317, DateTimeKind.Utc).AddTicks(8197),
+                            CreatedAt = new DateTime(2026, 5, 25, 16, 55, 17, 422, DateTimeKind.Utc).AddTicks(8290),
                             Description = "Standard pricing for regular customers",
                             DiscountPercent = 0m,
                             IsActive = true,
@@ -6807,7 +6807,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 2,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 5, 24, 14, 36, 3, 317, DateTimeKind.Utc).AddTicks(8203),
+                            CreatedAt = new DateTime(2026, 5, 25, 16, 55, 17, 422, DateTimeKind.Utc).AddTicks(8297),
                             Description = "5% discount for preferred customers",
                             DiscountPercent = 5m,
                             IsActive = true,
@@ -6818,7 +6818,7 @@ namespace PowderCoating.Infrastructure.Migrations
                         {
                             Id = 3,
                             CompanyId = 0,
-                            CreatedAt = new DateTime(2026, 5, 24, 14, 36, 3, 317, DateTimeKind.Utc).AddTicks(8204),
+                            CreatedAt = new DateTime(2026, 5, 25, 16, 55, 17, 422, DateTimeKind.Utc).AddTicks(8298),
                             Description = "10% discount for premium customers",
                             DiscountPercent = 10m,
                             IsActive = true,
@@ -8172,6 +8172,9 @@ namespace PowderCoating.Infrastructure.Migrations
                     b.Property<bool>("AllowAiPhotoQuotes")
                         .HasColumnType("bit");
 
+                    b.Property<bool>("AllowCustomFormulas")
+                        .HasColumnType("bit");
+
                     b.Property<bool>("AllowOnlinePayments")
                         .HasColumnType("bit");
 

src/PowderCoating.Web/Controllers/DataPurgeController.cs

@@ -293,6 +293,16 @@ public class DataPurgeController : Controller
                 break;
 
             case "Jobs":
+                // Appointments.JobId is a nullable FK — null it out first so the DELETE
+                // doesn't violate FK_Appointments_Jobs_JobId.
+                var purgingJobIds = await _db.Jobs.IgnoreQueryFilters()
+                    .Where(e => e.IsDeleted && e.DeletedAt <= cutoff)
+                    .Select(e => e.Id)
+                    .ToListAsync();
+                if (purgingJobIds.Count > 0)
+                    await _db.Appointments.IgnoreQueryFilters()
+                        .Where(a => a.JobId.HasValue && purgingJobIds.Contains(a.JobId.Value))
+                        .ExecuteUpdateAsync(s => s.SetProperty(a => a.JobId, (int?)null));
                 count = await _db.Jobs.IgnoreQueryFilters()
                     .Where(e => e.IsDeleted && e.DeletedAt <= cutoff).ExecuteDeleteAsync();
                 break;