#3427 chore: Use `nox.session(default=...)` to mark default sessions and make `noxfile.py` executable Pull request opened by edgarrmondragon ## Summary by Sourcery Configure Nox session defaults and reuse behavior while aligning contributor docs with the updated Nox usage and making the Noxfile directly executable. Enhancements: • Enable Nox virtual environment reuse via configuration rather than per-invocation flags. • Refine which Nox sessions are considered default by explicitly marking non-default sessions. • Make the Nox configuration file directly executable as a script entry point. Documentation: • Update contributor documentation to reflect the new default Nox invocation pattern and session selection flags, including guidance on running the Noxfile directly. Chores: • Remove the obsolete Nox session used for version bumping from the project configuration. meltano/sdk