feat(quota): add live commandcode-quota dashboard and OMP auth fix

Fetches live account quota from Command Code alpha usage endpoints
(whoami, billing/credits, billing/subscriptions, usage/summary) and
renders a plain-text dashboard via ui.notify.

- Graceful degradation: optional endpoint transport/timeout/parse
  failures degrade to null sections instead of aborting; only 401/403
  are hard failures. 429 is transient, not fatal.
- Overall deadline bounds the whole command to QUOTA_TIMEOUT_MS
  (per-request controllers are chained; post-deadline phases fail fast).
- OMP auth: filter unresolved $COMMANDCODE_API_KEY placeholder and fall
  back to the host resolver via pickCommandCodeApiKey.
- ZDR privacy header respected on quota requests.
- Redaction reuses redactCommandCodeErrorText plus JSON-quoted
  credential fields; outer-catch errors are redacted too.
- resetAt parsed from seconds, ms, numeric string, or ISO string.
- 21 hermetic unit tests wired into npm test (test:quota).