Add --real-video-bitrate/-rvb and --real-audio-bitrate/-rab to measure a track's true bitrate from actual media size instead of the manifest's declared value, which is often inflated. Useful for accurate track listings and --vbitrate/--vbitrate-range selection.
Single-file tracks are measured exactly; segmented HLS/DASH/ISM are sampled. Only the top renditions per quality tier are probed, in parallel, so it stays fast. Without the flags, behaviour is unchanged.
Covers RemoteClient/RemoteService, REST routes, handlers, SessionStore, InputBridge, DownloadQueueManager, errors, compression, and serve CLI. E2e tier opts in via --live and can auto-spawn its own serve.
* Added logic to check for executables in a local `binaries` directory.
* Enhanced Windows support by checking for `.exe` extensions.
* Removed unnecessary `binaries/` entry from `.gitignore`.
