feat(cli): scoped maple delete (service, namespace, env) for the local store - #1203

🟢 Confidence 5/5 · safe to merge
The changed hunk only re-shapes flag decoding, is exercised by new tests, and changes no request the server receives.
_{quality 100/100 · no findings · tests covered · risk low}

This head turns buildDeleteRequest into an Effect that distinguishes an out-of-range flag from a missing selector, and adds tests for both. The change is small and correct; only flag validation changed since the last review.

• buildDeleteRequest now fails with invalid delete flags on a failed decode, and with the selector message only when neither --service nor --namespace is present

_{3b2d586 · Updated on every push. Reply "won't fix" to dismiss a finding, or mention @maple-review-bot to ask about one.}