Bump e2b SDK dependencies to latest

[mishushakov]

Summary

• Bump npm e2b minimum from ^2.19.2 to ^2.19.4 (latest on npm).
• Bump PyPI e2b minimum from ^2.20.2 to ^2.20.3 (latest on PyPI).
• Add a changeset to mark both @e2b/code-interpreter and e2b-code-interpreter for a patch release.

Test plan

• CI green

[cursor]

PR Summary

Low Risk
Low risk dependency-only change updating the pinned e2b SDK versions in JS and Python; main risk is unexpected upstream behavior changes in the newer SDK releases.

Overview
Bumps the minimum e2b SDK dependency versions for both packages: JS e2b from ^2.19.2 to ^2.19.4 (with pnpm-lock.yaml updates) and Python e2b from ^2.20.2 to ^2.20.3 (with poetry.lock updates).

Adds a Changeset marking @e2b/code-interpreter and @e2b/code-interpreter-python for a patch release to publish the new minimum supported SDK versions.

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