Set up Cursor Cloud dev environment (AGENTS.md)

[devansh-dek]

Summary

Sets up the development environment for this Python quant-trading toolkit and documents it for future Cloud agents.

• Adds AGENTS.md with a ## Cursor Cloud specific instructions section covering the venv-based setup, lint/test/backtest/walk-forward commands, and the optional live paper-trading mode (needs Binance Testnet keys).
• Configures the startup update script (venv creation + pip install -e ".[dev]").

No application code was changed.

Verification

All commands run inside the project-local venv/ (Python 3.12).

Step	Command	Result
Verify	python scripts/verify_setup.py	All checks OK
Lint	ruff check src tests config scripts run_*.py	All checks passed
Tests	pytest tests/ -v	12 passed
Backtest	python run_backtest.py --report	-41.66% return, HTML report generated
Walk-forward	python run_walkforward.py	12 OOS windows, aggregate metrics produced

Live paper trading (run_live.py) is an optional mode requiring user-provided Binance Testnet keys in .env; without them the exchange wrapper fails gracefully (expected).

Backtest HTML report

Backtest report metrics
Equity curve and drawdown

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