0. видос от липовского https://www.youtube.com/watch?v=88kTYPwQ6QI
  1. https://vorpus.org/blog/timeouts-and-cancellation-for-humans/
  2. https://reprep.io/writings/20220326_timeouts_deadline_propagation.html
  3. https://backendbytes.com/articles/go-context-resilient-microservices/
  4. https://peps.python.org/pep-0533/ — iterator cleanup on scope exit (deferred)
    5. https://peps.python.org/pep-0568/ — ContextVar leakage in generators (deferred)
  5. https://peps.python.org/pep-0789/ — cancel scopes + async generators (active)
