feat: initialize v3.3.0 statistics module structure

- Create new statistics module directory
- Add module __init__.py with planned exports
- Add README documenting architecture and phases
- Prepare for async-first statistics implementation

Part of breaking change to make statistics 100% async

Author: TexasCoding

src/project_x_py/statistics/README.md

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+# Statistics Module
+
+## Overview
+
+The statistics module provides async-first, comprehensive statistics tracking and aggregation for all ProjectX SDK components.
+
+## Architecture
+
+### Phase 1: Core Implementation (In Progress)
+- [x] Module structure created
+- [ ] base.py - BaseStatisticsTracker
+- [ ] collector.py - ComponentCollector
+- [ ] aggregator.py - StatisticsAggregator
+- [ ] health.py - HealthMonitor
+- [ ] export.py - StatsExporter
+
+### Phase 2: Component Migration
+- [ ] OrderManager migration
+- [ ] PositionManager migration
+- [ ] RealtimeDataManager migration
+- [ ] OrderBook migration
+- [ ] RiskManager migration
+
+### Phase 3: Cleanup
+- [ ] Remove old statistics files
+- [ ] Update all imports
+- [ ] Documentation updates
+
+## Key Features
+
+- **100% Async**: All methods are async for consistency with SDK architecture
+- **Parallel Collection**: Statistics gathered from all components simultaneously
+- **Smart Locking**: Single read-write lock per component for efficiency
+- **Health Monitoring**: 0-100 health score based on multiple factors
+- **Multiple Export Formats**: JSON, Prometheus, Datadog support
+- **Type Safe**: Full TypedDict usage for all statistics
+
+## Migration from v3.2.x
+
+See [Migration Guide](../../docs/migration/v3.3.0_statistics.md) for details on migrating from the old statistics system.

src/project_x_py/statistics/__init__.py

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+"""
+Async-first statistics system for ProjectX SDK.
+
+This module provides comprehensive statistics tracking, aggregation, and export
+capabilities for all SDK components with 100% async architecture.
+
+Author: SDK v3.3.0
+Date: 2025-01-21
+
+Key Components:
+    - BaseStatisticsTracker: Core async statistics tracking
+    - ComponentCollector: Component-specific statistics collection
+    - StatisticsAggregator: Parallel statistics aggregation
+    - HealthMonitor: Health scoring and monitoring
+    - StatsExporter: Multiple export format support
+
+Example:
+    ```python
+    from project_x_py import TradingSuite
+
+    suite = await TradingSuite.create("MNQ")
+
+    # Get comprehensive statistics
+    stats = await suite.get_stats()
+    print(f"Health Score: {stats['health_score']}")
+
+    # Export to different formats
+    prometheus_metrics = await suite.export_stats("prometheus")
+    ```
+"""
+
+from project_x_py.statistics.aggregator import StatisticsAggregator
+from project_x_py.statistics.base import BaseStatisticsTracker, StatisticsProvider
+from project_x_py.statistics.collector import ComponentCollector
+from project_x_py.statistics.export import StatsExporter
+from project_x_py.statistics.health import HealthMonitor
+
+__all__ = [
+    "BaseStatisticsTracker",
+    "StatisticsProvider",
+    "ComponentCollector",
+    "StatisticsAggregator",
+    "HealthMonitor",
+    "StatsExporter",
+]
+
+__version__ = "3.3.0"