Fix release validation to parse YAML instead of grepping comments

The validate-packages-yml job was using grep to check for git hash
references in packages.yml, which also matched commented-out lines.
This caused the release to fail even though the actual YAML config
was correct.

Replace the grep-based validation with a Python script that properly
parses the YAML, ignoring comments and only checking actual package
entries.

Co-Authored-By: Itamar Hartstein <haritamar@gmail.com>

Author: devin-ai-integration[bot]

.github/workflows/release.yml

@@ -15,18 +15,47 @@ jobs:
       - name: Checkout Elementary
         uses: actions/checkout@v4
 
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+
+      - name: Install PyYAML
+        run: pip install pyyaml
+
       - name: Validate dbt-data-reliability is not a git hash reference
         run: |
-          PACKAGES_FILE="./elementary/monitor/dbt_project/packages.yml"
-          if grep -q 'git: https://github.com/elementary-data/dbt-data-reliability.git' "$PACKAGES_FILE"; then
-            echo "::error::packages.yml contains a git hash reference for dbt-data-reliability. Releases must use a proper package version (e.g. 'package: elementary-data/elementary' with a 'version:' field). Please update packages.yml before releasing."
-            exit 1
-          fi
-          if ! grep -q 'package: elementary-data/elementary' "$PACKAGES_FILE"; then
-            echo "::error::packages.yml does not contain a proper package reference for elementary-data/elementary. Please update packages.yml before releasing."
-            exit 1
-          fi
-          echo "packages.yml validation passed - using proper package version reference."
+          python - <<'EOF'
+          import yaml
+          import sys
+
+          packages_file = "./elementary/monitor/dbt_project/packages.yml"
+          with open(packages_file) as f:
+              data = yaml.safe_load(f)
+
+          packages = data.get("packages", [])
+
+          has_git_ref = any(
+              "git" in pkg and "dbt-data-reliability" in pkg["git"]
+              for pkg in packages
+          )
+          if has_git_ref:
+              print("::error::packages.yml contains a git hash reference for dbt-data-reliability. "
+                    "Releases must use a proper package version (e.g. 'package: elementary-data/elementary' "
+                    "with a 'version:' field). Please update packages.yml before releasing.")
+              sys.exit(1)
+
+          has_package_ref = any(
+              pkg.get("package") == "elementary-data/elementary"
+              for pkg in packages
+          )
+          if not has_package_ref:
+              print("::error::packages.yml does not contain a proper package reference for "
+                    "elementary-data/elementary. Please update packages.yml before releasing.")
+              sys.exit(1)
+
+          print("packages.yml validation passed - using proper package version reference.")
+          EOF
 
   publish-to-pypi:
     needs: validate-packages-yml