fix: async interceptor should_intercept must be sync + temporal example fixes

[andreahlert]

Summary

Fixes bugs in the interceptor lifecycle hooks introduced in #602:

• should_intercept on async interceptor classes was declared async def, but callers use it inside lambdas passed to get_first_matching_hook() which cannot await. An async should_intercept returns a coroutine object (always truthy), silently matching every action regardless of the predicate logic. Changed to def with a note explaining why.
• StreamingActionInterceptorHookAsync.intercept_stream_run_and_update was def but the caller checks isasyncgenfunction, so it needs to be async def to match.
• Temporal example called worker_adapter_set.get_hooks() which doesn't exist on LifecycleAdapterSet. Replaced with call_all_lifecycle_hooks_async().
• Temporal worker hook signatures used str for action and **kwargs instead of Action and **future_kwargs.

Test plan

• All 311 tests pass (core + lifecycle + interceptor integration tests)
• No changes to test files needed (tests already used sync should_intercept)
• Verified no remaining async def should_intercept in codebase