fix(scripts): replace GNU find -printf with POSIX basename

[dknos]

Summary

• Replaces GNU-only find -printf '%f\n' with POSIX-compatible find ... -exec basename {} \;
• Fixes silent failure on macOS/BSD where -printf is not available

Test plan

• Run backup-workspace.sh on Linux
• Verify output matches previous behavior
• Run shellcheck on the modified script

Fixes #1431

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Improved restore selection when no timestamp is provided so the most recent available backup is correctly identified and used.
  • Behavior unchanged for preference of newest entry; the process will still fail gracefully if no backups are found.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: a7350935-4c08-4ae8-b3db-521db7a247a6

📥 Commits

Reviewing files that changed from the base of the PR and between 069f16a and 0f077aa.

📒 Files selected for processing (1)

• scripts/backup-workspace.sh

✅ Files skipped from review due to trivial changes (1)

• scripts/backup-workspace.sh

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📝 Walkthrough

Walkthrough

When restoring without a timestamp, the script now extracts backup directory names using find ... -exec basename {} \; instead of find ... -printf '%f\n'; results are still sorted descending and the latest entry is selected, with unchanged failure behavior when none found.

Changes

Cohort / File(s)	Summary
Backup script compatibility scripts/backup-workspace.sh	Replaced GNU-only find -printf '%f\n' with POSIX-compatible find ... -exec basename {} \; in do_restore() when no timestamp is provided; sorting and selection logic preserved.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

I nibble through backup trails at night,
Swapping GNU crumbs for POSIX light.
BSD spots no longer hide,
Backups found with steady stride—🐇
A small hop, the fix feels right.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: replacing GNU-specific find -printf with POSIX-compatible basename in a shell script.
Linked Issues check	✅ Passed	The PR directly addresses issue #1431 by replacing GNU find -printf with POSIX-compatible find -exec basename, fixing the macOS/BSD compatibility issue.
Out of Scope Changes check	✅ Passed	All changes are scoped to the backup-workspace.sh script's do_restore() function and directly address the POSIX compatibility requirement.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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