Set operation response timeout to a runtime value

The only way I could find to set a response timeout for a specific operation was using the `ResponseTimeout` attribute.
We's like to be able to specify this value from configuration / call parameters.
Would it be possible to add a `SetDefaultResponseTimeout` method to `IInvokable` so we could use it in a call filter?

Start by tracing IInvokable and the existing ResponseTimeout attribute to understand how operation response timeouts are applied, then inspect the call-filter path for runtime configuration or parameters. Done means a runtime-set default response timeout is supported and covered by tests for configuration and per-call behavior.

Written by the indexing model from the issue text.