Follow-up to Ben's PR #37892. Adds a TestInternalCredential block to
test_dashboard_auth_ws_tickets.py exercising the mint-once stability,
multi-use, unminted-rejection, empty-value, wrong-value, reset-and-remint,
and ticket-store-independence branches directly (previously only covered
indirectly via _ws_auth_ok, which left the unminted and empty-value
branches unexercised).
Also corrects the consume_internal_credential docstring: the returned
identity dict is discarded by the current _ws_auth_ok caller (which only
needs the boolean outcome), so the prior 'carry it into its session log'
wording over-promised.
Phase 5 task 5.1. Browsers cannot set Authorization on a WebSocket
upgrade, so in gated mode the SPA needs an alternative way to bind the
upgrade to its authenticated session.
hermes_cli/dashboard_auth/ws_tickets.py — in-memory single-use ticket
store with 30s TTL. Thread-safe (threading.Lock), token_urlsafe(32)
values, ticket value truncated to 8 chars in error messages for log
hygiene. Module-level state with _reset_for_tests() helper.
hermes_cli/dashboard_auth/routes.py — adds POST /api/auth/ws-ticket.
Auth-required (the gate middleware already attaches Session to
request.state.session). Returns {ticket, ttl_seconds}; emits
WS_TICKET_MINTED audit event with user_id + provider + ip.
hermes_cli/dashboard_auth/audit.py — adds WS_TICKET_REJECTED enum
value for the consume-side rejection event (wired into the WS
endpoints in task 5.2).
11 new tests covering round-trip, single-use, TTL boundary, unknown
ticket rejection, secret-hygiene truncation in error messages, and
concurrent mint+consume from 20 threads.
