Upgraded LXC 151 from 1.156.0 to 1.157.1 (packages.matrix.org, Trixie).
The host was found on 1.156.0 despite this README recording 1.155.0 — an
intermediate upgrade had gone unlogged. Corrected the infra and Tech Stack
tables and noted the drift so future upgrades verify with dpkg rather than
trusting the docs.
Not a security release (no CVEs in range; the last were fixed in 1.152.1),
but 1.157.0 fixes an application-service ephemeral-events regression shipped
in 1.156.0, which affects hookshot. No schema-version bump (94 -> 94) and the
three new background updates completed immediately. Our experimental_features
block (MatrixRTC/Element Call MSCs) is unaffected by 1.157.0's removal of
msc3861, which we do not use; it was preserved via --force-confold.
Also adds a Synapse upgrade runbook — the repo had no documented procedure or
automation for this at all, so the two prior upgrades were done out-of-band.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
