v1.29.1

Fixed

• ./stack apply / ./stack upgrade no longer needlessly recreate bitcoind.
  configure.sh regenerated a fresh rpcauth salt on every run, which rotated the
  derived hash and changed the bitcoin container's env — so docker compose up -d
  recreated bitcoind (triggering its 5-minute flush grace) on every apply or
  upgrade, even for an unrelated change like a dashboard-only edit. The salt is
  now preserved across runs (like the RPC password already was), so an unchanged
  password re-renders byte-identical and only the containers that actually changed
  are recreated. A changed password still rotates the hash and correctly recreates
  bitcoind.
• The upgrade-agent systemd example now runs as the repo owner, not root. The
  1.29.0 unit in docs/operations.md omitted User=, so it defaulted to root and
  the upgrade's git fetch/checkout failed with "dubious ownership" on a
  user-owned checkout. Added User=YOU (must be in the docker group) and
  RestartSec.