scheduler

name	scheduler
description	Change automatic capture cadence, the 15-minute floor, or system-event triggers. Use when snapshots fire too often, not at all, or nextCaptureDate is wrong.

Scheduler

SnapshotScheduler.decide is a pure function. Platforms supply Timer / BGAppRefresh / WKApplicationRefresh; they must not fork the decision.

• Disabled = cadence .off and capturesOnSystemEvents == false.
• Cadence off with system events still enabled is a valid schedule.
• minimumInterval (default 900s) applies to every trigger, including wake/unlock.
• First run with no lastCapture captures immediately when enabled.
• skipsWhenUnchanged is applied later by SnapshotService.capture(skipIfUnchanged:), not by decide.

Tests: Tests/Domain/SchedulerTests.swift and scheduler invariants.