Added support for configuring all major Jellyfin paths (data, config, cache, log, temp, web) via a `startup.json` file, with priority after CLI and environment variables. Introduced a new `TempDir` option, configurable through CLI, env var, or config file, with backward-compatible defaults. Refactored path resolution logic to integrate file-based config and ensure directory creation. Updated constructors and CLI options to support temp directory. Improved EF Core migration error handling and logging. Added comprehensive documentation and example config files. All changes are backward compatible.
Refactored all C# test files to use explicit namespace declarations and moved all using directives inside the namespace block for consistency. Updated assembly info and cache files to reflect the new build. Adjusted MvcTestingAppManifest.json to use fully qualified assembly names. No functional changes; all updates are related to code style, organization, and project metadata.