feat: add auto filename trim

[arabcoders]

• feat: added auto filename trim.
• The Dockerfile now builds with the bgutil-ytdlp-pot-provider server and its dependencies, enabling the PO-token provider by default and ensuring version consistency between the Python and Deno implementations. The entrypoint now uses tini for better signal handling.
• The FAQ.md and README.md now direct users to the root compose.yaml for all deployment scenarios, including hardware acceleration, external storage, FlareSolverr, Chromium browser extraction, and the bundled POT provider. This reduces duplication and keeps documentation up-to-date with the actual configuration.
• The new YTP_BGUTIL_ENABLED environment variable is documented and enabled by default, allowing users to disable the bundled PO-token provider if desired.