Recovery editor note + refresh CI action pins + scaffold M15 merge (#43,#44,#50) (#66)

Co-authored-by: claude <claude@jpaul.io>
Co-committed-by: claude <claude@jpaul.io>

modules/18-continuous-delivery-and-deployment/lab/cd-starter.yml

@@ -23,8 +23,8 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v7
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
       - run: pip install pytest ruff
@@ -38,7 +38,7 @@ jobs:
     if: github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       # Log in to your container registry (Module 16's images need a durable home, like a Git remote
       # is for commits). Registry/credentials are provider-specific — supply them as secrets,