Polish build flow and README formatting

- update-lockfile.yml: rename workflow to "Update lockfiles"
- release.yml: add explicit uv python install 3.13 for consistency with other workflows
- docker-publish.yml: rename cpu cache scope from linux/amd64-cpu to cpu (now multi-arch)
- README: add GitHub release version badge and License badge
- README: shorten QUALITY_REPLACEMENT table cell

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

.github/workflows/docker-publish.yml

@@ -192,8 +192,8 @@ jobs:
           file: ./Dockerfile
           platforms: linux/amd64,linux/arm64
           build-args: VARIANT=cpu
-          cache-from: type=gha,scope=linux/amd64-cpu
-          cache-to: type=gha,mode=max,scope=linux/amd64-cpu
+          cache-from: type=gha,scope=cpu
+          cache-to: type=gha,mode=max,scope=cpu
           github-token: ${{ secrets.GITHUB_TOKEN }}
           push: true
           tags: ${{ steps.cpu-tag.outputs.tag }}

.github/workflows/release.yml

@@ -37,6 +37,9 @@ jobs:
       - name: Install uv
         uses: astral-sh/setup-uv@v7
 
+      - name: Set up Python
+        run: uv python install 3.13
+
       - name: Verify release branch
         if: github.event_name == 'workflow_dispatch'
         run: |

.github/workflows/update-lockfile.yml

@@ -1,5 +1,5 @@
 # .github/workflows/update-lockfile.yml
-name: Update uv.lock
+name: Update lockfiles
 
 on:
   push: