Add scripts for PostgreSQL migration and SQLite removal; update project references

- Introduced `publish-with-sql.ps1` to publish Jellyfin with SQL files.
- Added `remove-sqlite.ps1` to facilitate the removal of SQLite dependencies for PostgreSQL-only deployment.
- Created `rollback-to-net10.ps1` to revert .NET 11 changes back to .NET 10.
- Implemented `test_api.py` for testing API interactions.
- Added `verify-migration.ps1` to verify PostgreSQL migration steps.
- Updated various `.csproj` files to include `Microsoft.Kiota.Abstractions` package.
- Enhanced `JellyfinDbContext` to handle concurrency exceptions during save operations.
- Updated tests to include new package references and ensure compatibility with changes.

scripts/windows/Add-Base-Indexes.bat

@@ -0,0 +1,37 @@
+@echo off
+REM Add missing base performance indexes to Jellyfin database
+
+echo ========================================
+echo Add Base Performance Indexes
+echo ========================================
+echo.
+echo These indexes were missing from InitialCreate
+echo Adding 18 essential performance indexes...
+echo.
+
+"C:\Program Files\PostgreSQL\18\bin\psql.exe" -U jellyfin -d jellyfin -f sql\add_base_performance_indexes.sql
+
+if %ERRORLEVEL% EQU 0 (
+    echo.
+    echo ========================================
+    echo Success! Base indexes added.
+    echo ========================================
+    echo.
+    echo Indexes created:
+    echo - 9 on BaseItems
+    echo - 2 on BaseItemProviders  
+    echo - 2 on MediaStreamInfos
+    echo - 2 on PeopleBaseItemMap
+    echo - 3 on UserData
+    echo.
+    echo Next: Restart Jellyfin
+    echo.
+) else (
+    echo.
+    echo ========================================
+    echo Failed to add indexes
+    echo ========================================
+    echo.
+)
+
+pause