v1.20.0

Added

• New @temporalio/langsmith package for tracing Temporal apps to LangSmith.
  It hooks the client, Workflow, and Activity interceptors so a Workflow and the Activities it runs show up
  as a single LangSmith run tree.

Changed

• protobufjs bumped to ^7.6.4
• Updated Core to 5df57f6d. Package-visible changes from this update include:
  • NativeConnection initialization now retries without gRPC gzip compression if the server
    cannot decompress the eager GetSystemInfo call.
  • Workflow replay now honors SDK flags already recorded in history even when the server does not
    advertise SDK metadata support.
  • OTLP metric export failures from Core's periodic metric reader are now logged through Core
    telemetry.
• @temporalio/openai-agents: Query handlers and update validators now derive trace span IDs from the SDK's
  replay-safe random source instead of a private seeded PRNG. This removes the old seed-collision workaround
  and gives read-only handlers distinct, well-formed span IDs.

Full Changelog: v1.19.0...v1.20.0