Task: Add plotting of session data

This page documents a task in the Session telemetry and plotting story. It captures the goal, current status, acceptance, and any notes or results.

Goal

Sample RTT + bytes per session into a TimescaleDB hypertable and plot the history in My Sessions.

Field	Value
State	DONE
Parent story	Session telemetry and plotting
Now	Completed 2026-02-22.
Waiting on	None.
Next	None.
Last touched	2026-02-22

bytes_sent + bytes_received synced from live connection before logout.
Client pings carry previous-heartbeat RTT (latency_ms).
Server records session_sample rows at each heartbeat; persists batch into ores_iam_session_samples_tbl (TimescaleDB hypertable).
Protocol: get_session_samples_request / _response (0x2072 / 0x2073).
Status-bar plug icon: dynamic tooltip with live address, bytes, RTT.
Interactive QChartView/QLineSeries panel plots bytes_sent + bytes_received over time.
qt6-charts vcpkg dep added.
TimescaleDB skill doc gets a hypertable / chunk-interval / compression section.

Captured during execution; cleared into the parent story on close.

First real consumer of the TimescaleDB telemetry infrastructure landed in earlier sprints.

Session history visualised end-to-end.