Defines the cloud-side managed gateway provisioning surface
(POST/GET /api/integrations/agent-network/managed-proxy) and its
response objects so clients consume generated types instead of
hand-written ones. POST is idempotent: 202 when the call starts (or
restarts) provisioning, 200 when a deployment already exists; 409
names an already-assigned endpoint the managed flow does not own and
503 signals temporarily exhausted endpoint allocation.
In this PR, speed up the GRPC message processing, force the recreation of the ICE agent when getting a new, remote offer (do not wait for local STUN timeout).