fix(sessions): allow builtins.getattr in migration unpickler for py31…

[manish08k]

…1 + crewai

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[sarathak]

Hi @manish08k — not a maintainer here, just came across this PR. The fix itself looks reasonable: adding ("builtins", "getattr") to the allow-list for the Python 3.11 pickle_by_enum_name case, and the inline comment explaining why it's safe (the getattr target is itself gated by the same find_class check) makes sense to me.

A couple of things that might help this move through review, since the PR description is still the unfilled template:

• Problem description: it'd help reviewers to know what triggered this
• Tests: the checklist and testing plan are both empty. A small regression test that unpickles a pickle_by_enum_name-style payload on 3.11 (and would fail without this change) would make the fix easy to verify.

Might make it easier for a maintainer to review and merge quickly. Nice catch on the underlying issue either way!