- Added Jellyfin.Database.Providers.Postgres project with full EF Core migration support for PostgreSQL.
- Implemented automatic database creation and privilege assignment on startup.
- Generated initial migration and model snapshot for PostgreSQL schema.
- Updated build, test, and dependency files to include PostgreSQL provider and Npgsql packages.
- Added PowerShell script for generating and testing PostgreSQL migrations.
- No changes to application logic outside database provider/migration infrastructure.
Upgraded the target framework for all main, test, and provider projects from .NET 10.0 (net10.0) to .NET 11.0 (net11.0). Updated all major NuGet dependencies to their .NET 11-compatible versions, including Microsoft.AspNetCore.*, Microsoft.EntityFrameworkCore.*, Microsoft.Extensions.*, Serilog, System.Text.Json, and Npgsql.EntityFrameworkCore.PostgreSQL (now 11.0.0-preview.1). Regenerated all project.assets.json, NuGet cache, and MSBuild files to reflect the new framework and package versions. Removed or updated incompatible dependencies and references. Set allWarningsAsErrors: true in NuGet spec files for stricter builds. No application logic changes were made; all updates are related to project configuration, dependency management, and build system modernization for .NET 11.0.