tac: install git in tacchaind go-builder stage

The golang:alpine go-builder stage runs git clone/checkout but never
installed git, causing compose build to fail with exit 127 on rpc-de-32.

Co-authored-by: Cursor <cursoragent@cursor.com>

tac/tacchaind.Dockerfile

@@ -6,6 +6,7 @@ FROM golang:1.23.8-alpine3.21 AS go-builder
 RUN apk add --no-cache \
     ca-certificates \
     build-base \
+    git \
     libusb-dev \
     linux-headers \
     eudev-dev