feat: add backtester and enable ranging-regime filter

fix: calculate active trade P&L and R:R immediately on history loading

feat: add feed health monitoring and structure-based TP2/trailing stop rules

Remove unprofitable 15m timeframe symbols (ETHUSDT & EURUSD) from the entire application

Optimize SL ATR buffers dynamically, enforce zone freshness, and align backtester spread execution

fix: implement weekend Day-of-Week stats, client cooldown state sync, and client transition scanning

debug: return detailed telegram API errors from test-telegram endpoint

feat: add test-telegram API route to trigger test notifications

fix: implement transition-based candle scanning and duplicate scan guard on server

Enable Grade B setups (Score >= 4) in autopilot/client scanners and update Telegram and active trade card UI to display Grade badges

Apply user's multi-key Twelve Data integration for Forex/Metals with dedicated polling cycles and Yahoo fallback routing

Apply user's HTML Cache-Buster Engine in static and fallback routes

Apply user's absolute backstop, dynamic clamp bounding, and API edge outlier filtering

Completely remove and clean up Twelve Data integration from the codebase

fix: disable browser caching for /api/market-data endpoint

perf: implement centralized server market-data cache, staggered polling, and spot drift TTL

feat: implement spot gold offset engine and telegram notification loops with smart SL post-mortems

fix: implement hybrid OANDA-Yahoo active-background streaming engine, limiting Twelve Data requests to exactly 5/min to fully eliminate all 429 errors

fix: implement centralized Twelve Data scheduler with staggered bootup and dynamic active symbol capturing, fully resolving HTTP 429 rate limit crashes

feat: implement Twelve Data provider integration with secure Express API proxy, automated server-side caching, and key-activated OANDA spot gold/forex upgrade

fix: inject headers in proxy routes to bypass yahoo finance bot blocks

fix: migrate crypto to yahoo finance to bypass US geoblocks

fix: resolve express 5 catch-all wildcard routing compilation

fix: resolve express 5 wildcard routing compilation

feat: migrate to full-stack cloud autopilot terminal with mongodb atlas