Add sentiment_engine with CryptoSentimentCalibrator fixes - improved keyword lists, lowered FinBERT threshold, added neutral handling

sentiment_engine/docker/Dockerfile

@@ -0,0 +1,61 @@
+# Sentiment Engine Dockerfile
+# Multi-stage build for production
+
+# =============================================================================
+# Build stage
+# =============================================================================
+FROM python:3.12-slim as builder
+
+WORKDIR /app
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc g++ cmake \
+    libpq-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+COPY pyproject.toml .
+RUN pip install --no-cache-dir --upgrade pip setuptools wheel && \
+    pip install --no-cache-dir .
+
+# =============================================================================
+# Runtime stage
+# =============================================================================
+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    libpq5 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy Python packages from builder
+COPY --from=builder /usr/local/lib/python3.12/site-packages /usr/local/lib/python3.12/site-packages
+COPY --from=builder /usr/local/bin /usr/local/bin
+
+# Copy application code
+COPY src/ ./src/
+COPY config/ ./config/
+COPY prefect_flows/ ./prefect_flows/
+COPY scripts/ ./scripts/
+
+# Create non-root user
+RUN useradd -m -u 1000 sentiment && chown -R sentiment:sentiment /app
+USER sentiment
+
+# Environment
+ENV PYTHONPATH=/app/src
+ENV SENTIMENT_CONFIG=/app/config/settings.yaml
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
+    CMD curl -f http://localhost:8080/health || exit 1
+
+# Expose ports
+EXPOSE 8080 9090
+
+# Entry point
+ENTRYPOINT ["python", "-m", "sentiment_engine.main"]