stats B11: EP-Online energy labels (monthly total file → homes per label for NL, Gouda, Gouda PC4s; aggregates only), stats.ep_label_agg, monthly timer with key from ~/.config/stats/ep-online.env, charts on /stats/energy and /stats/gouda

deploy/stats-collector/stats-collector-run.sh

@@ -31,4 +31,16 @@ DB_URL=$(sudo -n docker inspect personal-website-app-1 --format '{{range .Config
 	| sed -n 's/^DB_URL=//p' | sed 's/@db:5432/@127.0.0.1:5440/')
 [ -n "$DB_URL" ] || { echo "no DB_URL from app container" >&2; exit 1; }
 export DB_URL
+# Per-source API keys live in ~/.config/stats/<name>.env (mode 600); exported, never echoed.
+case "$source_name" in
+	eponline) env_file="$HOME/.config/stats/ep-online.env" ;;
+	*) env_file="" ;;
+esac
+if [ -n "$env_file" ]; then
+	[ -r "$env_file" ] || { echo "missing $env_file" >&2; exit 1; }
+	set -a
+	# shellcheck disable=SC1090
+	. "$env_file"
+	set +a
+fi
 exec nice -n 10 bun scripts/stats-fetch.ts "$@"