Expose experimental activity sessions and worker affinity

[THardy98]

Summary

• Update Core to temporalio/sdk-rust@242e4f82 and regenerate bindings for changed protobuf inputs.
• Expose experimental SessionWorkerOptions and per-activity ActivitySessionOptions across remote activity APIs, interceptors, and the Rust bridge.
• Expose separately documented, short-lived ExperimentalWorkerAffinityOptions for stable sticky destinations and single-workflow polling.
• Preserve default task queue/eager behavior and leave local activities unchanged.

Review guide

Review Python first, then the companion Core change: temporalio/sdk-rust#1670.

Two commits separate the Core pin/generated bindings/imported release notes from handwritten Python APIs and tests. Protobuf generation used the documented local fallback because Docker ran out of space; unchanged-input generation churn was excluded.

Validation

• Editable extension built with poe build-develop.
• poe test -s -n 0 tests/worker/test_activity_sessions.py tests/worker/test_worker_affinity_config.py tests/worker/test_visitor.py tests/worker/test_command_aware_visitor.py: 159 passed.
• poe lint: passed (including all three type checkers).
• poe bridge-lint: passed.
• Independent review of handwritten API/bridge changes found no actionable issues.
• Full test suite and live-server affinity, saturation, retry routing, and rate-limit tests were not run locally. Draft opened for CI and review.

Open in Delta