fix: Docker workflow version extraction for manual dispatch (#359)

- Added fetch-depth: 0 and fetch-tags: true to checkout action to ensure tags are available
- Added debug output to show extracted version
- Fixes the empty version issue when running workflow_dispatch from main branch

Author: joshrotenberg

.github/workflows/docker.yml

@@ -20,6 +20,9 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          fetch-tags: true
 
       - name: Extract version
         id: version
@@ -34,6 +37,7 @@ jobs:
           else
             VERSION=${GITHUB_REF#refs/tags/v}
           fi
+          echo "Extracted version: $VERSION"
           echo "version=$VERSION" >> $GITHUB_OUTPUT
           echo "major=$(echo $VERSION | cut -d. -f1)" >> $GITHUB_OUTPUT
           echo "minor=$(echo $VERSION | cut -d. -f1-2)" >> $GITHUB_OUTPUT