- Bump render_async/2 timeout to 2_000ms across contact_live_test.
Default 100ms races when the suite runs on a loaded box — ContactLive.
Show fans out 8 hydration tasks at mount and sporadically missed the
window even on a quiet DB.
- Telemetry metrics-shape assertion uses Enum.any?/1 instead of the
`metrics != []` comparison Elixir 1.19's type system flags as a
distinct-type comparison (the function's non-empty return type).