Add EUR/USD support and 4-button Telegram scanner

Add EURUSD pair with dynamic pair info lookup. Telegram bot now shows
4 scan buttons: EUR/USD 15M, EUR/USD 1H, USD/JPY 15M, USD/JPY 1H.
Each indicator displays directional arrows in the message output.
Price formatting adapts per pair (5dp for EUR, 3dp for JPY).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

data_provider.py

@@ -1,5 +1,5 @@
 """
-ForexBot2 — Data Provider (Twelve Data SDK, USD/JPY only)
+ForexBot2 — Data Provider (Twelve Data SDK)
 ==========================================================
 Fetches and validates OHLCV via the official `twelvedata` Python SDK.
 """
@@ -13,7 +13,7 @@ from typing import Dict, Optional
 import pandas as pd
 from twelvedata import TDClient
 
-from config import PlatformConfig, Timeframe, USDJPY, DISPLAY, PIP_VALUE
+from config import PlatformConfig, Timeframe, USDJPY, PAIR_INFO
 
 logger = logging.getLogger(__name__)
 
@@ -37,6 +37,12 @@ class ForexDataProvider:
         Timeframe.W1:  "1week",
     }
 
+    BARS_PER_DAY = {
+        Timeframe.M1: 1440, Timeframe.M5: 288, Timeframe.M15: 96,
+        Timeframe.M30: 48, Timeframe.H1: 24, Timeframe.H4: 6,
+        Timeframe.D1: 1, Timeframe.W1: 0.143,
+    }
+
     RATE_LIMIT = 8
     RATE_WINDOW = 60.0
 
@@ -103,23 +109,18 @@ class ForexDataProvider:
         return None
 
     def get_spread_estimate(self, symbol: str = USDJPY) -> float:
-        """Estimate spread from recent M5 H-L median; fallback to 1 pip on JPY."""
         try:
             df = self.fetch_ohlcv(symbol, Timeframe.M5, lookback_days=1)
             if df is not None and not df.empty:
                 return float((df["High"] - df["Low"]).median())
         except Exception:
             pass
-        # Fallback: 1 pip = 0.01 for JPY pairs
-        return PIP_VALUE
+        info = PAIR_INFO.get(symbol, PAIR_INFO[USDJPY])
+        return info["pip_value"]
 
     def get_pair_info(self, symbol: str = USDJPY) -> Dict:
-        return {
-            "symbol": symbol,
-            "display": DISPLAY,
-            "pip_value": PIP_VALUE,
-            "is_jpy_pair": True,
-        }
+        info = PAIR_INFO.get(symbol, PAIR_INFO[USDJPY])
+        return {"symbol": symbol, **info}
 
     # ── Private ────────────────────────────────────────────────────