fix: close progress bars when save/download fails

[voidborne-d]

Description

Fixes the progress-bar cleanup bug in langextract/io.py by closing both the save and download tqdm bars from finally blocks, so generator failures and streaming request errors do not leave terminal state behind.

Fixes #401

Bug fix

How Has This Been Tested?

pytest -q tests/io_test.py

Checklist:

• I have read and acknowledged Google's Open Source Code of conduct.
• I have read the Contributing page, and I either signed the Google Individual CLA or am covered by my company's Corporate CLA.
• I have discussed my proposed solution with code owners in the linked issue(s) and we have agreed upon the general approach.
• I have made any needed documentation changes, or noted in the linked issue(s) that documentation elsewhere needs updating.
• I have added tests, or I have ensured existing tests cover the changes.
• I have followed Google's Python Style Guide and ran pylint over the affected code.

[github-actions]

No linked issues found. Please link an issue in your pull request description or title.

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[github-actions]

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[voidborne-d]

Quick note: this PR already links the issue in the description via Fixes #401.

I also refreshed the branch earlier today, and GitHub's update-branch API now reports there are no newer commits on main, so the remaining blockers here look bot-side rather than code-side.

[github-actions]

⚠️ Branch Update Required

Your branch is 2 commits behind main. Please update your branch to ensure CI checks run with the latest code:

git fetch origin main
git merge origin/main
git push

Note: Enable "Allow edits by maintainers" to allow automatic updates.