Workflow Determinism Replay

TypeScript OrderWorkflow calls `Date.now()` to pick shipping tier; Worker logs NondeterminismError on replay after pod restart. Event History already recorded a timer branch. Docs require workflow.Now() or SideEffect.

Agent removes raw Date.now(), uses workflow.Now() (or SideEffect for one-time external clock read), adds replay test in CI, and redeploys Worker with same Task Queue.

Go BillingWorkflow reads LaunchDarkly at start using SideEffect wrapper; flag must not re-fetch on replay changing branch. History shows Activity scheduled later — flag choice must be pinned.

Agent wraps external read in workflow.SideEffect (Go) or equivalent, stores result in workflow variable, documents that Activities are for mutating side effects not one-off reads.

Java SLAWorkflow compares Instant.now() in workflow method with Activity-returned deadline; mismatch after DST jump. Agent should use Workflow.currentTimeMillis() for workflow-side comparisons.

Agent uses Workflow.currentTimeMillis() / workflow.Now() on workflow side, keeps wall clock only inside Activities, documents timer vs activity time boundaries.