Make backend copy more granular

[imnasnainaec]

Three benefits to this pr:

• Skip unintended system files (esp. lost+found)
• When --verbose is used, shows copy progress
• If there's a copy error (e.g., permission denied to copy into .CombineFiles), kubectl will fail more quickly

https://app.devin.ai/review/sillsdev/TheCombine/pull/4230

---

This change is 

[coderabbitai]

Warning

Rate limit exceeded

@imnasnainaec has exceeded the limit for the number of commits that can be reviewed per hour. Please wait 13 minutes and 28 seconds before requesting another review.

Your organization is not enrolled in usage-based pricing. Contact your admin to enable usage-based pricing to continue reviews beyond the rate limit, or try again in 13 minutes and 28 seconds.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 781b6fcc-a952-4a5b-9601-0d047d74b5c4

📥 Commits

Reviewing files that changed from the base of the PR and between e0c5628 and 22ffecb.

📒 Files selected for processing (1)

• maintenance/scripts/combine_restore.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch maint-combine-restore-backend-cp

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.94%. Comparing base (e0c5628) to head (22ffecb).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4230   +/-   ##
=======================================
  Coverage   75.94%   75.94%           
=======================================
  Files         303      303           
  Lines       11352    11352           
  Branches     1407     1407           
=======================================
  Hits         8621     8621           
  Misses       2330     2330           
  Partials      401      401           

Flag	Coverage Δ
backend	87.23% <ø> (ø)
frontend	66.79% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[jasonleenaylor]

@jasonleenaylor reviewed 1 file and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on imnasnainaec).