fix(init): debug log whoami fallback

[Lexiie]

Summary

Resubmission of #209 after the release-process hiccup closed it without merge.

Covers one src/commands/init.ts catch path from #186.

After setup successfully configures credentials, it runs a display-only whoami lookup to fill the final summary. If that lookup fails, setup intentionally continues with a placeholder summary. That behavior is fine, but the failure was completely silent, so --debug users could not tell why the summary fell back to no email / production / empty scopes.

This PR keeps default output and exit behavior unchanged, but emits a debug-only stderr line when the display-only identity lookup fails.

Changes

• Capture the swallowed runWhoami error in runInit.
• Emit [debug] setup identity lookup failed after configure: ... only when --debug is set.
• Add a regression test that JSON stdout remains parseable while the debug line goes to stderr.

Verification

• rtk vitest run src/commands/init.test.ts -t "debug log whoami fallback|whoami fallback|debug"
• rtk npx eslint src/commands/init.ts src/commands/init.test.ts --fix-dry-run --format stylish
• rtk npx eslint src/commands/init.ts src/commands/init.test.ts
• rtk npm run typecheck

Refs #186

Summary by CodeRabbit

• Bug Fixes
  • Improved init handling when identity lookup fails during setup, so the process still completes and prints a valid summary.
  • Added debug logging for lookup failures, while keeping JSON output clean and parseable.
  • Added coverage to verify the initialized status is still returned and debug messages appear only on stderr.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Run ID: f42b7380-aba5-40df-926a-d9030a611af0

📥 Commits

Reviewing files that changed from the base of the PR and between 3305dfa and 5cff88a.

📒 Files selected for processing (2)

• src/commands/init.test.ts
• src/commands/init.ts

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Walkthrough

Modifies error handling in runInit's whoami step to log a debug message when the identity lookup fails and debug mode is enabled, while retaining the existing placeholder fallback. Adds a corresponding unit test verifying stderr output and JSON stdout integrity.

Changes

Init Debug Logging

Layer / File(s)	Summary
Debug error logging on identity lookup failure src/commands/init.ts, src/commands/init.test.ts	runWhoami's catch block now captures the error and logs a debug message with the failure reason when opts.debug is true, falling back to a placeholder identity as before; a new test confirms stderr reports the failure while stdout remains valid JSON with status: 'initialized'.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 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: adding debug logging for the init whoami fallback.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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