fix: image version in pypi pr workflow (#18735)

.github/workflows/release-pypi-pr.yml

@@ -34,13 +34,14 @@ jobs:
       - name: Generate PR wheel version
         id: gen_version
         run: |
-          # Get base version from setuptools_scm
-          cd python
-          pip install setuptools-scm
-          FULL_VERSION=$(python -c "from setuptools_scm import get_version; print(get_version(root='..'))")
-          # Strip any existing .dev or + suffix to get clean base version
-          BASE_VERSION=$(echo "$FULL_VERSION" | sed 's/\.dev.*//;s/+.*//')
-          cd ..
+          # Get base version from the latest v*.*.* git tag directly
+          # Note: We cannot use setuptools_scm here because the [tool.setuptools_scm]
+          # config (with custom git_describe_command) lives in python/pyproject.toml,
+          # not at the repo root. Without that config, setuptools_scm falls back to
+          # default git describe which finds gateway-* tags instead of v*.*.* release tags.
+          LATEST_TAG=$(git tag --list --sort=-version:refname 'v*.*.*' | head -1)
+          BASE_VERSION=${LATEST_TAG#v}
+          echo "Latest release tag: ${LATEST_TAG}"
 
           # Get commit info
           COMMIT_HASH=$(git rev-parse --short HEAD)