ci(airflow): Add dbt image workflow

.github/workflows/dev_dbt.yaml

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+---
+name: Build and publish dbt-demo
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+      # TODO (@NickLarsenNZ): Also build on release branches, but with a stackable0.0.0-dev or stackableXX.X.X tag.
+      # - release-*
+    paths:
+      - demos/airflow-scheduled-job/dbt/Dockerfile
+      - demos/airflow-scheduled-job/dbt/requirements.txt
+      - .github/workflows/dev_dbt.yaml
+
+jobs:
+  build_image:
+    name: Reusable Workflow
+    uses: ./.github/workflows/reusable_build_image.yaml
+    secrets:
+      harbor-robot-secret: ${{ secrets.HARBOR_ROBOT_DEMOS_GITHUB_ACTION_BUILD_SECRET }}
+      slack-token: ${{ secrets.SLACK_CONTAINER_IMAGE_TOKEN }}
+    with:
+      image-name: dbt-demo
+      # TODO (@NickLarsenNZ): Use a versioned image with stackable0.0.0-dev or stackableXX.X.X so that
+      # the demo is reproducable for the release and it will be automatically replaced for the release branch.
+      image-version: 0.0.1
+      containerfile-path: demos/airflow-scheduled-job/dbt/Dockerfile

demos/airflow-scheduled-job/dbt/Dockerfile

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+FROM python:3.12-slim-bullseye AS builder
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y \
+    git \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create virtual environment
+RUN python -m venv /opt/venv
+ENV PATH="/opt/venv/bin:$PATH"
+
+# Install Python packages
+COPY requirements.txt .
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# Final stage
+FROM python:3.12-slim-bullseye
+
+RUN apt-get update && apt-get install -y \
+    git \
+    curl \
+    vim \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy virtual environment from builder
+COPY --from=builder /opt/venv /opt/venv
+ENV PATH="/opt/venv/bin:$PATH"
+
+WORKDIR /dbt
+
+COPY dbt_test ./dbt_test
+
+# Security: non-root user
+RUN useradd -m -u 1000 dbt && chown -R dbt:dbt /dbt
+USER dbt
+
+ENV DBT_PROFILES_DIR=/dbt
+
+CMD ["dbt", "run"]

demos/airflow-scheduled-job/dbt/dbt_test/dbt_project.yml

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+---
+name: 'dbt_demo'
+version: '1.0.0'
+config-version: 2
+profile: 'trino_demo'
+model-paths: ['models']
+macro-paths: ['macros']
+target-path: "target"
+clean-targets: ['target']

demos/airflow-scheduled-job/dbt/dbt_test/macros/id_in_range.sql

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+{% test id_in_range(model, column_name) %}
+select *
+from {{ model }}
+where {{ column_name }} < 1 or {{ column_name }} > 5
+{% endtest %}

demos/airflow-scheduled-job/dbt/dbt_test/models/my_table.sql

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+{{ config(materialized='table') }}
+select * from (values (1),(2),(3),(4),(5)) as t(id)

demos/airflow-scheduled-job/dbt/dbt_test/models/schema.yml

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+---
+version: 2
+
+models:
+  - name: my_table
+    description: "A simple demo table with integer IDs"
+    columns:
+      - name: id
+        description: "ID value"
+        tests:
+          - not_null        # built-in dbt test
+          - unique          # optional: ensure no duplicates
+          - id_in_range

demos/airflow-scheduled-job/dbt/dbt_test/packages.yml

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+---
+packages: []

demos/airflow-scheduled-job/dbt/dbt_test/profiles.yml

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+---
+trino_demo:
+  outputs:
+    iceberg:
+      type: trino
+      method: ldap
+      user: "{{ env_var('TRINO_USER') }}"
+      password: "{{ env_var('TRINO_PASSWORD') }}"
+      catalog: iceberg
+      host: "{{ env_var('TRINO_HOST') }}"
+      port: "{{ env_var('TRINO_PORT') | int }}"
+      schema: dbt_schema
+      threads: 1
+      cert: "{{ env_var('CERT_PATH') }}"
+      verify: true
+
+  target: iceberg

demos/airflow-scheduled-job/dbt/requirements.txt

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+dbt-core==1.10.13
+dbt-trino==1.9.3