A factory that constructs an ITelephonyCallSdk for a session — the creation seam (mirroring the
meeting SDK factories, e.g. ZoomMeetingSdkFactory). Production supplies a factory that builds the
real provider adapter from resolved config; tests supply one that returns an in-memory fake.
A factory that constructs an ITelephonyCallSdk for a session — the creation seam (mirroring the meeting SDK factories, e.g.
ZoomMeetingSdkFactory). Production supplies a factory that builds the real provider adapter from resolved config; tests supply one that returns an in-memory fake.