apikey delete "" exits 0 with false success message

[baktun14]

Summary

akt console apikey delete '' prints API key deleted. and exits 0 without deleting anything.

Repro

akt console apikey list -o json   # note count N
akt console apikey delete ''
# → "API key  deleted." EXIT 0
akt console apikey list -o json   # still count N — nothing removed

Invalid UUIDs correctly fail with 400 validation error.

Expected

• Require a non-empty UUID; EXIT ≠ 0 when missing/invalid.
• Do not print a success message unless a key was actually deleted.

Impact

Scripts that pass an empty id from a failed parse believe cleanup succeeded.