Migrate Docker image registry from deprecated GCR to Artifact Registry

[Copilot]

Google Container Registry (gcr.io/asia.gcr.io) is deprecated. This migrates the Docker image push destination to Google Artifact Registry.

Changes

• delivery.yml

  • Update gcloud auth configure-docker to target the Artifact Registry hostname
  • Change image ref from asia.gcr.io/prismdb/<service>:<sha> → asia-northeast1-docker.pkg.dev/prismdb/prismdb/<service>:<sha>

• build.yml

  • Remove the gcloud auth configure-docker step — the build job only uses public base images and never pushes, so registry auth is unnecessary

- run: gcloud auth configure-docker --quiet
+ run: gcloud auth configure-docker ${{env.GCP_REGION}}-docker.pkg.dev --quiet

- run: echo "IMAGE=asia.gcr.io/${{env.GCP_PROJECT}}/${{ matrix.SERVICE_NAME }}:${{ github.sha }}" >> $GITHUB_ENV
+ run: echo "IMAGE=${{env.GCP_REGION}}-docker.pkg.dev/${{env.GCP_PROJECT}}/prismdb/${{ matrix.SERVICE_NAME }}:${{ github.sha }}" >> $GITHUB_ENV

Prerequisite: An Artifact Registry repository named prismdb must exist in the prismdb GCP project under region asia-northeast1 before this workflow runs successfully.