Sync master back to dev (IF EXISTS migration hotfix)

Prod and dev databases diverged on whether ShopWorker tables and indexes
exist, causing unconditional DROP statements to fail on prod. Replaced
all individual DropForeignKey/DropTable/DropIndex/DropColumn calls with
a single SQL block using IF EXISTS guards so the migration runs safely
regardless of DB state.

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

src/PowderCoating.Infrastructure/Migrations/20260519151303_AddAppointmentReminderSentAt.cs

@@ -11,47 +11,32 @@ namespace PowderCoating.Infrastructure.Migrations
         /// <inheritdoc />
         protected override void Up(MigrationBuilder migrationBuilder)
         {
-            migrationBuilder.DropForeignKey(
-                name: "FK_Jobs_ShopWorkers_ShopWorkerId",
-                table: "Jobs");
-
-            migrationBuilder.DropForeignKey(
-                name: "FK_JobTimeEntries_ShopWorkers_ShopWorkerId",
-                table: "JobTimeEntries");
-
-            migrationBuilder.DropForeignKey(
-                name: "FK_MaintenanceRecords_ShopWorkers_ShopWorkerId",
-                table: "MaintenanceRecords");
-
-            migrationBuilder.DropTable(
-                name: "ShopWorkerRoleCosts");
-
-            migrationBuilder.DropTable(
-                name: "ShopWorkers");
-
-            migrationBuilder.DropIndex(
-                name: "IX_MaintenanceRecords_ShopWorkerId",
-                table: "MaintenanceRecords");
-
-            migrationBuilder.DropIndex(
-                name: "IX_JobTimeEntries_ShopWorkerId",
-                table: "JobTimeEntries");
-
-            migrationBuilder.DropIndex(
-                name: "IX_Jobs_ShopWorkerId",
-                table: "Jobs");
-
-            migrationBuilder.DropColumn(
-                name: "ShopWorkerId",
-                table: "MaintenanceRecords");
-
-            migrationBuilder.DropColumn(
-                name: "ShopWorkerId",
-                table: "JobTimeEntries");
-
-            migrationBuilder.DropColumn(
-                name: "ShopWorkerId",
-                table: "Jobs");
+            // Use IF EXISTS guards for all ShopWorker drops — prod and dev diverged on whether
+            // these objects exist, so unconditional drops would fail on whichever DB is missing them.
+            migrationBuilder.Sql(@"
+                IF EXISTS (SELECT 1 FROM sys.foreign_keys WHERE name = 'FK_Jobs_ShopWorkers_ShopWorkerId')
+                    ALTER TABLE [Jobs] DROP CONSTRAINT [FK_Jobs_ShopWorkers_ShopWorkerId];
+                IF EXISTS (SELECT 1 FROM sys.foreign_keys WHERE name = 'FK_JobTimeEntries_ShopWorkers_ShopWorkerId')
+                    ALTER TABLE [JobTimeEntries] DROP CONSTRAINT [FK_JobTimeEntries_ShopWorkers_ShopWorkerId];
+                IF EXISTS (SELECT 1 FROM sys.foreign_keys WHERE name = 'FK_MaintenanceRecords_ShopWorkers_ShopWorkerId')
+                    ALTER TABLE [MaintenanceRecords] DROP CONSTRAINT [FK_MaintenanceRecords_ShopWorkers_ShopWorkerId];
+                IF EXISTS (SELECT 1 FROM sys.tables WHERE name = 'ShopWorkerRoleCosts')
+                    DROP TABLE [ShopWorkerRoleCosts];
+                IF EXISTS (SELECT 1 FROM sys.tables WHERE name = 'ShopWorkers')
+                    DROP TABLE [ShopWorkers];
+                IF EXISTS (SELECT 1 FROM sys.indexes WHERE name = 'IX_MaintenanceRecords_ShopWorkerId' AND object_id = OBJECT_ID('MaintenanceRecords'))
+                    DROP INDEX [IX_MaintenanceRecords_ShopWorkerId] ON [MaintenanceRecords];
+                IF EXISTS (SELECT 1 FROM sys.indexes WHERE name = 'IX_JobTimeEntries_ShopWorkerId' AND object_id = OBJECT_ID('JobTimeEntries'))
+                    DROP INDEX [IX_JobTimeEntries_ShopWorkerId] ON [JobTimeEntries];
+                IF EXISTS (SELECT 1 FROM sys.indexes WHERE name = 'IX_Jobs_ShopWorkerId' AND object_id = OBJECT_ID('Jobs'))
+                    DROP INDEX [IX_Jobs_ShopWorkerId] ON [Jobs];
+                IF EXISTS (SELECT 1 FROM sys.columns WHERE name = 'ShopWorkerId' AND object_id = OBJECT_ID('MaintenanceRecords'))
+                    ALTER TABLE [MaintenanceRecords] DROP COLUMN [ShopWorkerId];
+                IF EXISTS (SELECT 1 FROM sys.columns WHERE name = 'ShopWorkerId' AND object_id = OBJECT_ID('JobTimeEntries'))
+                    ALTER TABLE [JobTimeEntries] DROP COLUMN [ShopWorkerId];
+                IF EXISTS (SELECT 1 FROM sys.columns WHERE name = 'ShopWorkerId' AND object_id = OBJECT_ID('Jobs'))
+                    ALTER TABLE [Jobs] DROP COLUMN [ShopWorkerId];
+            ");
 
             migrationBuilder.AddColumn<DateTime>(
                 name: "ReminderSentAt",