831ecd0cab
Root cause of the Grafana "readdirent /etc/grafana/dashboards: no such file or
directory": the CI runner checks out into an ephemeral act workspace that is
removed after the job, so binding the compose config files straight from it
dangles the mounts in the long-lived containers (verified the act source dir is
emptied after the job). caddy/otelcol/prometheus/tempo read their config once at
startup so they survive, but would break on a restart — same latent bug.
Fix (mirrors ../galaxy-game's $HOME/.galaxy-dev/monitoring): the deploy job seeds
the config dirs to a stable $HOME/.scrabble-deploy and the compose binds them via
${SCRABBLE_CONFIG_DIR:-.} (local runs keep "."). Documented in the compose header,
deploy/README.md and the ci.yaml step.