Unknown Member Boolean Cast Fix (#30)

* Add release workflow to auto-tag and create GitHub releases

Extracts version from dbt_project.yml on push to main, checks if the
tag already exists, and creates a GitHub release with changelog notes.

.... Generated with [Cortex Code](https://docs.snowflake.com/en/user-guide/cortex-code/cortex-code)

Co-Authored-By: Cortex Code <noreply@snowflake.com>

* Address review: remove PyYAML dependency and fail on missing changelog

- Replace python3 yaml import with grep/sed to extract version from
  dbt_project.yml (PyYAML not guaranteed on ubuntu-latest runners)
- Add error check if version extraction fails
- Fail workflow with clear error if CHANGELOG.md has no entry for the
  detected version instead of silently creating an empty release

.... Generated with [Cortex Code](https://docs.snowflake.com/en/user-guide/cortex-code/cortex-code)

Co-Authored-By: Cortex Code <noreply@snowflake.com>

---------

Co-authored-by: Cortex Code <noreply@snowflake.com>

Author: jonhopper-dataengineers

.github/workflows/release.yml

@@ -0,0 +1,90 @@
+name: Tag and Release
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Extract version from dbt_project.yml
+        id: version
+        run: |
+          VERSION=$(grep "^version:" dbt_project.yml | sed "s/version: *['\"]\\(.*\\)['\"/]/\\1/")
+          if [ -z "$VERSION" ]; then
+            echo "::error::Could not extract version from dbt_project.yml"
+            exit 1
+          fi
+          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+          echo "Detected version: $VERSION"
+
+      - name: Check if tag already exists
+        id: check_tag
+        run: |
+          if git rev-parse --verify "refs/tags/${{ steps.version.outputs.version }}" >/dev/null 2>&1; then
+            echo "exists=true" >> "$GITHUB_OUTPUT"
+            echo "Tag ${{ steps.version.outputs.version }} already exists — skipping release."
+          else
+            echo "exists=false" >> "$GITHUB_OUTPUT"
+            echo "Tag ${{ steps.version.outputs.version }} does not exist — will create release."
+          fi
+
+      - name: Extract changelog for this version
+        if: steps.check_tag.outputs.exists == 'false'
+        id: changelog
+        run: |
+          VERSION="${{ steps.version.outputs.version }}"
+          # Use Python for exact string matching (no regex dot issues)
+          # Outputs: release title (from header) and release notes (body)
+          python3 -c "
+          import sys
+          version = sys.argv[1]
+          header_prefix = '## ' + version
+          found = False
+          title = ''
+          lines = []
+          for line in open('CHANGELOG.md'):
+              stripped = line.rstrip()
+              if stripped.startswith('## '):
+                  if found:
+                      break
+                  if stripped == header_prefix or stripped.startswith(header_prefix + ' ') or stripped.startswith(header_prefix + '\t'):
+                      found = True
+                      title = stripped[3:].strip()
+                      continue
+              if found:
+                  lines.append(line.rstrip())
+          if not found:
+              print(f'::error::No changelog entry found for version {version}')
+              sys.exit(1)
+          print('TITLE=' + title)
+          with open('/tmp/release_notes.md', 'w') as f:
+              f.write('\n'.join(lines))
+          " "$VERSION" > /tmp/release_meta.txt
+
+          TITLE=$(grep '^TITLE=' /tmp/release_meta.txt | cut -d= -f2-)
+          echo "title=$TITLE" >> "$GITHUB_OUTPUT"
+          echo "Release title: $TITLE"
+          echo "Release notes:"
+          cat /tmp/release_notes.md
+
+      - name: Create GitHub release
+        if: steps.check_tag.outputs.exists == 'false'
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh release create "${{ steps.version.outputs.version }}" \
+            --title "${{ steps.changelog.outputs.title }}" \
+            --notes-file /tmp/release_notes.md \
+            --target "${{ github.sha }}"