Fix "Retry all" on pending retries requesting an empty date range

[johnsimons]

"Retry all" on the Pending Retries view sent both from and to as new Date(0), so ServiceControl received an empty range in 1970 and retried nothing, while the UI still marked every row as submitted for retry. The bug goes back to the Vue migration (#1367): the AngularJS service sent epoch to now, and the migration transcribed the to as epoch too. retryAll now recomputes the date range from the selected period at click time and sends that, so the request also honors the period filter the same way the list does, which matches the old AngularJS behaviour.

Testing this through the UI surfaced a second bug. #2685 exposed selectedQueue from the store as shallowReadonly, but the queue dropdown writes to it through a storeToRefs v-model. Vue silently drops writes to a readonly ref, so selecting a queue never reached the store: the list never filtered by queue and "Retry all" always showed the "Select a queue first" dialog. Removing the wrapper makes the dropdown work again.

New driver tests in retrying-all-pending-retries.spec.ts cover the flow end to end: clicking Retry all without a queue shows the notice and sends no request, with a queue selected the request carries the queue address and the displayed period range up to now, and picking "Retried in the last 2 Hours" narrows the range to two hours. Since they drive the real dropdown, they will also fail if selectedQueue ever becomes readonly again.

Reviewer Checklist

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