pub const MCP_STREAM_HEARTBEAT_SECS: u64 = 30;Expand description
Heartbeat cadence for the resumable /mcp GET stream. Matches the
/v1/graph/stream discipline (30s) so operator tooling can use one
timeout knob. v0.11.0 P2 makes this configurable indirectly via the
helper signature of [build_mcp_session_stream] so tests can pass
a short interval without driving the real clock for 30s.