A key can now be paused until the owner resumes it, or until a given
time. A paused key is rejected by validation before last_used is
updated, and a pause time that has passed lifts the pause by itself.
Existing keys stay active.
PATCH /api/auth/api-keys/:id takes {"disabled": bool, "paused_until":
RFC 3339 string or null}. Only the key owner can change it, and a
paused_until in the past is rejected. The key list returns the pause
fields. The Account page gets a Pause and Resume button for each key
and a Paused badge that shows the resume time.
Assisted-by: Claude Code:claude-sonnet-5-5
Co-authored-by: Ettore Di Giacinto <mudler@localai.io>
