[dpazj]

Summary

Fixes edge:ReceiveCommandTest, which timed out because the node never processed the TCK's rebirth command.

• Accept command payloads that omit the payload timestamp by using the receive time (MessageMetrics::from_payload_lenient), for both NCMD and DCMD.
• Stop data publishes before a command-triggered rebirth, so no DATA messages are sent after the rebirth request.
• Publish NBIRTH and all DBIRTHs from the same session when rebirthing.

Why

The Sparkplug TCK's rebirth NCMD has no payload timestamp:

Payload.newBuilder()
    .addMetrics(Metric.newBuilder().setName(NODE_CONTROL_REBIRTH)...)
    .build()

MessageMetrics::try_from(Payload) returns MissingTimestamp, so srad logged Received invalid CMD payload - ignoring request and never rebirthed. The TCK's rebirth-action-1 and rebirth-action-2 assertions then failed and the test timed out.

Result

edge:ReceiveCommandTest   PASS   14 assertions: 14 passed

Stable across 8 consecutive runs against tck-node. Regression tests:

edge:SendDataTest          PASS   40 passed, 4 not executed
edge:SendComplexDataTest   PASS   48/48
edge:SessionTerminationTest PASS  25 passed, 10 not executed

cargo fmt --all --check, cargo clippy --all-targets -- -D warnings, and cargo test pass.