fix downgrade health check failure for mariadb (#2737)

CHANGELOG.md

@@ -59,6 +59,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix stream failure when configured fallback filler collection is empty
 - Fix high CPU when errors are displayed; errors will now work ahead before throttling to realtime, similar to primary content
 - Fix startup error caused by duplicate smart collection names (and no longer allow duplicate smart collection names)
+- Fix erroneous downgrade health check failure with some installations that use MariaDB
 
 ### Changed
 - No longer round framerate to nearest integer when normalizing framerate

ErsatzTV.Infrastructure.MySql/Migrations/20251223150542_Fix_DowngradeWarning.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ErsatzTV.Infrastructure.MySql.Migrations
+{
+    /// <inheritdoc />
+    public partial class Fix_DowngradeWarning : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            // this migration was removed because it failed to apply successfully on MySql
+            // nonetheless, it succeeded on MariaDB so some users still have this history record
+            // which causes an erroneous "downgrade" warning (db has migration that app doesn't know about)
+            // so it needs to be cleaned up
+            migrationBuilder.Sql(
+                "DELETE FROM `__EFMigrationsHistory` WHERE `MigrationId` = '20250723030616_Update_MediaFilePath'");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+        }
+    }
+}