feat: add pipeline bridge for NATS to Argo/Kubeflow

- pipeline_bridge.py: Standalone bridge service
- pipeline_bridge_v2.py: handler-base version
- Supports Argo Workflows and Kubeflow Pipelines
- Workflow monitoring and status publishing
- Dockerfile variants for standalone and handler-base

Dockerfile

@@ -0,0 +1,29 @@
+FROM python:3.13-slim
+
+WORKDIR /app
+
+# Install uv for fast, reliable package management
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first for better caching
+COPY requirements.txt .
+RUN uv pip install --system --no-cache -r requirements.txt
+
+# Copy application code
+COPY pipeline_bridge.py .
+
+# Set environment variables
+ENV PYTHONUNBUFFERED=1
+ENV PYTHONDONTWRITEBYTECODE=1
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD python -c "print('healthy')" || exit 1
+
+# Run the application
+CMD ["python", "pipeline_bridge.py"]