Fix identity-service: rewrite SSH GitHub URLs to HTTPS for yarn

Some deps (digitalcredentials/jsonld.js) use ssh://git@github.com/ URLs.
Alpine CI runners have no SSH keys, so rewrite to HTTPS at build time.
Also add openssh-client so git can handle any remaining SSH probes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: sntiwari1

services/identity-service/Dockerfile

@@ -1,6 +1,7 @@
 FROM node:20.11.0-alpine3.18 AS install
 WORKDIR /app
-RUN apk add --no-cache git
+RUN apk add --no-cache git openssh-client
+RUN git config --global url."https://github.com/".insteadOf "ssh://git@github.com/"
 COPY package.json yarn.lock ./
 RUN yarn