Verified Embedded Subtitle Filter

Only streams with a verified embedded subtitle track are returned.

Fail closed. A successful probe that finds no Arabic subtitle rejects the stream. Release names, NFO claims and external subtitle availability never override a probe result. Unavailable streams are accepted only when the upstream exposes trusted per-file media metadata.

Use an AIOStreams manifest as the upstream to combine Torz, Comet and your other sources. Results can be empty: that is intentional when a file cannot be verified.