Subscription ops discovered via services/list + services/schema now
register a StreamingHandler (HandlerKind::Stream) that calls
CallConnection::subscribe_with_payload and forwards the remote stream
end-to-end (ADR-049 §8). Query/Mutation ops keep the existing
make_forwarding_handler (HandlerKind::Once).
- Add CallConnection::subscribe_with_payload(payload) mirroring
call_with_payload so the forwarding handler can populate forwarded_for
(ADR-032) + auth_token on the subscription payload. subscribe() now
delegates to subscribe_with_payload.
- Add make_streaming_forwarding_handler() in from_call.rs using
make_streaming_handler + futures::stream::once(...).flatten() to await
subscribe_with_payload then forward its stream.
- Branch build_bundles on spec.op_type (already parsed by rebuild_spec_for).
- Reuse build_forwarded_payload — no new payload-construction code.
- composition_authority: None, scoped_env: None for FromCall streaming
leaves (same as Query/Mutation FromCall leaves).
- Abort cascade (ADR-016 §6) already wired via PendingRequestMap in
subscribe_with_payload.
Closes the gap where a from_call-imported Subscription truncated to the
first value.
glm-5.2
67b1adba98