fix: make teardown resilient to already-deleted Neon branches

[Kitenite]

Summary

• Teardown script previously failed hard when the Neon branch was already deleted or didn't exist
• Now gracefully skips branch deletion when NEON_BRANCH_ID is missing or the branch is gone

Changes

• Missing NEON_BRANCH_ID: changed from error + exit to warning + skip
• neonctl branches delete failure: capture stderr and check for "not found" / "does not exist" / "already deleted" / "404" — treat as skip instead of failure
• Genuine deletion errors still fail with the command output included

Test Plan

• Delete a workspace whose Neon branch was already manually deleted — teardown should succeed
• Delete a workspace with no NEON_BRANCH_ID in .env — teardown should skip gracefully
• Delete a workspace with a valid Neon branch — teardown should delete it as before

Summary by CodeRabbit

• Bug Fixes
  • Improved cleanup operations with enhanced error handling that gracefully manages missing branch identifiers and expected deletion failures. The process now continues with warnings instead of stopping prematurely, ensuring cleanup sequences complete successfully in more scenarios while providing better visibility into non-fatal issues.

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The teardown script now gracefully handles missing Neon branch IDs and certain branch deletion failures by treating them as non-fatal warnings rather than stopping execution, allowing the teardown process to complete successfully even when the branch is already absent.

Changes

Cohort / File(s)	Summary
Neon Branch Deletion Error Handling .superset/teardown.sh	Modified error handling to capture deletion command output and conditionally treat "not found," "does not exist," or "404" error messages as non-fatal warnings instead of failures. When NEON_BRANCH_ID is missing, now emits warning and returns success rather than error.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• refactor: modularize setup and teardown scripts for resilience #527: Both PRs modify .superset/teardown.sh's Neon branch deletion logic to treat missing/nonexistent branches as non-fatal by capturing command output and emitting warnings instead of failing.
• fix(scripts): improve workspace setup/teardown reliability #333: Both PRs modify .superset/teardown.sh to make Neon branch deletion idempotent by treating missing/already-deleted branches as non-fatal warnings.
• Fix neon setup/teardown scripts #221: Both PRs modify .superset/teardown.sh's Neon branch deletion and NEON_BRANCH_ID error handling with tolerant control flow for certain failure conditions.

Poem

🐰 A branch that's gone? No fuss or fluster!
Teardown hops on without disaster
Warnings whisper where errors once barked
The script now shrugs—mission embarked! 🌙

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch kitenite/teardown-branch-already-deleted

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