assignment_strategy is now required

What changed

Partial payloads are rejected.

Affects UpdateEventRequest reachable from 1 operation.

Who is affected

Code that sends PagerDuty's UpdateEventRequest objects, used by 1 PagerDuty operation.

Before and after

Code that breaks

await client.post("/…", {
  // …
  assignment_strategy: /* now required */,
});

Based on PagerDuty’s published API specification. How severity is decided.