[CI/Build] Add stable version tags to Docker images during release (#801)

Tag Docker images with stable semantic versions (e.g., v0.1.9) from the
Helm chart version during scheduled releases. This allows users to
reference stable version tags in production instead of only dev versions.

Fixes #787

Signed-off-by: ardecode <desaiarijit@gmail.com>
Co-authored-by: Rui Zhang <51696593+zerofishnoodles@users.noreply.github.com>

Author: ardecode

.github/workflows/scheduled-release.yml

@@ -219,9 +219,11 @@ jobs:
           push: true
           tags: |
             ghcr.io/${{ github.repository }}/router:latest
+            ghcr.io/${{ github.repository }}/router:v${{ needs.prepare-release.outputs.new_version }}
             ghcr.io/${{ github.repository }}/router:${{ env.version }}
             ghcr.io/${{ github.repository }}/router:${{ github.sha }}
             lmcache/lmstack-router:latest
+            lmcache/lmstack-router:v${{ needs.prepare-release.outputs.new_version }}
             lmcache/lmstack-router:${{ env.version }}
           cache-from: type=registry,ref=ghcr.io/${{ github.repository }}/router:buildcache
           cache-to: type=registry,ref=ghcr.io/${{ github.repository }}/router:buildcache,mode=max