feat: initial Skeen-CRM AI Agent architecture

- FastAPI + Python 3.12 backend
- Meta WhatsApp Business API client (official)
- OpenAI GPT-4o with function calling
- RAG vector store with pgvector
- ERPNext Frappe REST client
- Celery + Redis async task queue
- PostgreSQL with migrations (Alembic)
- Docker Compose full stack
- Enterprise logging, metrics, health checks

Dockerfile

@@ -0,0 +1,57 @@
+# =============================================================================
+# SKEEN CRM Agent - Production Dockerfile
+# =============================================================================
+FROM python:3.12-slim AS builder
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    libpq-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install uv (modern Python package manager)
+RUN pip install --no-cache-dir uv
+
+# Set workdir
+WORKDIR /app
+
+# Copy dependency definitions
+COPY pyproject.toml ./
+
+# Create virtual environment and install dependencies
+RUN uv venv .venv && \
+    uv pip install --no-cache -r pyproject.toml
+
+# =============================================================================
+# Production stage
+# =============================================================================
+FROM python:3.12-slim AS production
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libpq5 \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user
+RUN groupadd -r skeen && useradd -r -g skeen skeen
+
+WORKDIR /app
+
+# Copy virtual environment from builder
+COPY --from=builder /app/.venv /app/.venv
+ENV PATH="/app/.venv/bin:$PATH"
+
+# Copy application code
+COPY --chown=skeen:skeen src/ ./src/
+COPY --chown=skeen:skeen alembic/ ./alembic/
+COPY --chown=skeen:skeen alembic.ini ./
+
+# Switch to non-root user
+USER skeen
+
+# Healthcheck
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:8000/health || exit 1
+
+EXPOSE 8000