Owner Connection Id Records Parity

Owner-agent REST callers can discover connectionid values from /v1/streams, but the polyfill owner read path still requires connectorid on stream record reads. This makes the public REST contract weaker than MCP and weaker than the advertised connection_id query shape.

The reference read surface has two adjacent routes with different purposes:

The CLI and executable tests SHALL consume the real public or reference-designated surfaces of the implementation rather than private database shortcuts or website-only glue.