Feature Request: Option to Replay Fixed Number of Interactions

[zby]

I want to use vcr for debugging and I would like to replay a fixed number of interactions and record the rest.
If I am not mistaken currently all interactions are either recorded or replayed based on the record mode. There's no built-in way to replay only a subset of recorded interactions while recording new ones.

As a workaround I can edit the cassette after each session and remove the new interactions that were saved - but that is a bit time consuming. It would be more convenient if there was a config option for that.

I can see two possibilities:

1. New Persister Implementation
   Create a subclass of FilesystemPersister that implements this functionality
   Would allow for custom handling of interaction limits without modifying core code
   Could be implemented by users without core changes
2. New Configuration Option
   Add a global config option (e.g., replay_limit: int)
   Would need to handle interaction with existing record_mode settings
   More user-friendly but requires core changes