Implements the shared validateSchedule validator (daily + weekly, midnight
spillover, Sunday->Monday wrap, adjacency, empty-block rejection), a
per-License-Key schedule service (get/set type, CRUD blocks, weekly
prefill with confirmation), the content-hash version/ETag serializer, the
new GET /api/v2/licenses/[licenseKey]/schedule (200/304/404, type null),
and additive evolution of the legacy GET /api/v2/schedule. Adds validator,
serializer (against docs/fixtures), endpoint ETag/304, and service tests.
Use TimeInput for Block start/end and show the day timeline axis with
AM/PM, so no 24-hour time is displayed in the schedule UI. New Blocks now
default dynamicAudio to true in the modal and server-side when the field
is absent; existing stored Blocks are untouched.
NeilClack