Add core infrastructure: config, Binance adapter, docs, and auto-setup

- Add Pydantic settings with trading mode validation (paper/testnet/live)
- Implement Binance USDⓈ-M Futures adapter with hedge mode, isolated margin
- Add type definitions for orders, positions, and market data
- Create documentation (PLAN.md, ARCHITECTURE.md, SECURITY.md)
- Add setup.sh with uv/pip auto-detection for consistent dev environments
- Configure Docker multi-stage build and docker-compose services
- Add pyproject.toml with all dependencies and tool configs

Dockerfile

@@ -0,0 +1,69 @@
+# TradeFinder Dockerfile
+# Multi-stage build for engine and UI targets
+
+# =============================================================================
+# BASE IMAGE
+# =============================================================================
+FROM python:3.11-slim AS base
+
+# System dependencies for TA-Lib and general build
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    wget \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install TA-Lib C library
+RUN wget -q http://prdownloads.sourceforge.net/ta-lib/ta-lib-0.4.0-src.tar.gz \
+    && tar -xzf ta-lib-0.4.0-src.tar.gz \
+    && cd ta-lib \
+    && ./configure --prefix=/usr \
+    && make \
+    && make install \
+    && cd .. \
+    && rm -rf ta-lib ta-lib-0.4.0-src.tar.gz
+
+# Set working directory
+WORKDIR /app
+
+# Copy project files
+COPY pyproject.toml README.md ./
+COPY src/ ./src/
+
+# Install Python dependencies
+RUN pip install --no-cache-dir --upgrade pip \
+    && pip install --no-cache-dir -e ".[dev]"
+
+# =============================================================================
+# ENGINE TARGET (trading engine, backtester, optimizer)
+# =============================================================================
+FROM base AS engine
+
+# Create non-root user for security
+RUN useradd --create-home --shell /bin/bash trader
+RUN mkdir -p /data && chown -R trader:trader /data /app
+
+USER trader
+
+# Default command
+CMD ["python", "-m", "tradefinder.core.main"]
+
+# =============================================================================
+# UI TARGET (Streamlit dashboard)
+# =============================================================================
+FROM base AS ui
+
+# Install additional UI dependencies
+RUN pip install --no-cache-dir streamlit plotly
+
+# Create non-root user
+RUN useradd --create-home --shell /bin/bash trader
+RUN mkdir -p /data && chown -R trader:trader /data /app
+
+USER trader
+
+# Expose Streamlit port
+EXPOSE 8501
+
+# Default command
+CMD ["streamlit", "run", "src/tradefinder/ui/app.py", "--server.port=8501", "--server.address=0.0.0.0"]