refactor(oi): improve data extraction and consolidate documentation

- Fix MQL5 API usage in EA to use correct CopyRates and POSITION_TYPE enums
- Refactor scraper data extraction to use drop_duplicates for unique strikes
- Consolidate Windows setup guide into main README
- Add virtual environment batch files for easier setup and execution
- Simplify run_scraper.bat to focus on core execution
- Normalize lot calculation to use SymbolInfo.LotsStep()

oi_scraper/setup_env.bat

@@ -0,0 +1,34 @@
+@echo off
+REM ==========================================
+REM CME OI Scraper - Virtual Environment Setup
+REM ==========================================
+
+echo ==========================================
+echo Setting up Python Virtual Environment
+echo ==========================================
+
+REM Navigate to script directory
+cd /d %~dp0
+
+REM Create virtual environment
+echo Creating virtual environment...
+py -3 -m venv venv
+
+REM Activate virtual environment and install dependencies
+echo Installing dependencies...
+call venv\Scripts\activate.bat
+pip install --upgrade pip
+pip install -r requirements.txt
+
+REM Install playwright browser
+echo Installing Playwright browser...
+python -m playwright install chromium
+
+echo ==========================================
+echo Setup Complete!
+echo ==========================================
+echo.
+echo To run the scraper, use: run_with_venv.bat
+echo.
+
+pause