we're aiming to automatically generate x-client-transaction-id header. due to a recent change on twitter backend, this header is now required. sadly, its not static, so would propably break again anytime soon
new extraction method first tries to fetch content directly from instagram graphql API, fallback to html embed page. in case every method fail, rely on 3rd party
- refactors http session usage across modules
- adjusts video info extraction
- improves temporary directory, concurrency limits, buffering, and error handling in download routines
