Fix release validation to parse YAML; add workflow_dispatch trigger

.github/workflows/release.yml

@@ -1,5 +1,11 @@
 name: Release package
 on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Tag to release (e.g. v0.23.0)"
+        required: true
+        type: string
   push:
     tags:
       - v[0-9].[0-9]+.[0-9]+
@@ -14,26 +20,59 @@ jobs:
     steps:
       - name: Checkout Elementary
         uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.tag || github.ref }}
+
+      - 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
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Elementary
         uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.tag || github.ref }}
 
       - name: Setup Python
         uses: actions/setup-python@v5
@@ -68,6 +107,8 @@ jobs:
     steps:
       - name: Checkout Elementary
         uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.tag || github.ref }}
 
       - name: Set up QEMU for multi-platform support
         uses: docker/setup-qemu-action@v3
@@ -87,6 +128,9 @@ jobs:
         uses: docker/metadata-action@v4
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=semver,pattern={{version}},value=${{ inputs.tag || '' }}
+            type=ref,event=tag
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v3
@@ -102,6 +146,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.tag || github.ref }}
       - name: PR master to docs
         uses: repo-sync/pull-request@v2
         with: