Point citadel btcprice at the local btcdata over btc-network

omarchy is gone, but the citadel deployment still set
BTCDATA_URL=http://192.168.50.42:4102 and ran standalone on its own
compose network. Every request that proxies to btcdata failed with
httpx.ConnectError: All connection attempts failed.

btcdata now runs on citadel too, so attach btcprice to the external
btc-network there and reach it by service name at http://btcdata:4102.
deploy-citadel.sh creates the network on the remote if missing, as
btcdata's own deploy script already does.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TRkiLhK5qhkZjP2adxpA3e

deploy-citadel.sh

@@ -7,6 +7,7 @@ IMAGE_NAME="${BTCPRICE_IMAGE_NAME:-btcprice:latest}"
 PLATFORM="${BTCPRICE_PLATFORM:-}"
 COMPOSE_FILE="docker-compose.citadel.yml"
 ENV_FILE=".env.citadel"
+NETWORK="${BTCPRICE_NETWORK:-btc-network}"
 FILES=("$COMPOSE_FILE" "$ENV_FILE")
 
 if [[ -z "$PLATFORM" ]]; then
@@ -35,6 +36,9 @@ docker build --platform "$PLATFORM" -t "$IMAGE_NAME" .
 echo "Preparing $APP_DIR on $HOST..."
 ssh "$HOST" "mkdir -p '$APP_DIR'"
 
+echo "Ensuring external network $NETWORK exists on $HOST..."
+ssh "$HOST" "docker network inspect '$NETWORK' >/dev/null 2>&1 || docker network create '$NETWORK'"
+
 echo "Copying $COMPOSE_FILE and $ENV_FILE to $HOST:$APP_DIR..."
 scp "$COMPOSE_FILE" "$HOST:$APP_DIR/docker-compose.yml"
 scp "$ENV_FILE" "$HOST:$APP_DIR/.env"