Add IHSG daily technical screener

[ioxis99]

Summary

• Screens the full IHSG universe (~950 symbols) for common bullish setups (Elliott Wave 2/5, pullback reversals, chart patterns, breakout+volume, trend following) via the existing CDP-driven TradingView connection
• Emits a Markdown report and an Excel workbook with buy/cutloss/TP levels per candidate
• Includes a historical backtest tool (backtest.js) and a next-day performance checker (performance.js) for the signals it produces
• Small supporting fixes surfaced while building this: process.exit() -> exitCode to dodge a Windows-only libuv assertion crash, exchange-qualified symbol matching (IDX:ANTM) in waitForChartReady, and a Windows-safe path in the sanitization test's source audit

screener/results/ (daily scan output) and .mcp.json (machine-local config) are gitignored.

Test plan

• node --test tests/sanitization.test.js — 68/68 passing
• Ran the full scan end-to-end against live TradingView Desktop (951 symbols, 51 matches)