feat: initial Ares scalping bot — momentum FVG strategy

Strategy: detect 3-candle momentum FVG on M5, enter on retrace fill.

Signal logic:
- Candle[i-1] must be a momentum candle: body ≥ BODY_PCT_MIN (default 60%)
  and close in top/bottom CLOSE_PCT_MIN (default 80%) of range
- FVG must exist between candle[i-2] and candle[i] (gap on momentum side)
- FVG zone midpoint = limit entry level
- SL: just outside FVG zone (+ optional SL_BUFFER)
- TP: entry ± SL_distance × MIN_RR

Features:
- EMA trend filter (EMA_PERIOD, same timeframe)
- FVG expiry (FVG_EXPIRY_CANDLES): stale setups auto-invalidate
- Currency conversion for non-USD profit pairs (JPY, CAD, CHF)
- Full friction model: spread, slippage, commission
- Date range filter (DATE_FROM / DATE_TO)
- Same stats output format as Hermes

Dependencies: domain + mt5-client from hermes/crates (path deps)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,32 @@
+# MT5 bridge URL (required)
+MT5_BASE_URL=http://localhost:8080
+
+# ── Symbol & Timeframe ──────────────────────────────────────────────────────
+SYMBOL=EURUSDm
+TIMEFRAME=M5
+
+# ── Backtest ─────────────────────────────────────────────────────────────────
+BACKTEST_BALANCE=600
+BACKTEST_CANDLES=50000
+# DATE_FROM=2025-01-01
+# DATE_TO=2025-12-31
+
+# ── Risk ─────────────────────────────────────────────────────────────────────
+RISK_PCT=0.01             # risk per trade (0.01 = 1%)
+
+# ── Momentum Candle Thresholds ───────────────────────────────────────────────
+BODY_PCT_MIN=0.6          # minimum body/range ratio (0.6 = 60% body)
+CLOSE_PCT_MIN=0.8         # close must be in top/bottom 20% of range
+
+# ── FVG Setup ────────────────────────────────────────────────────────────────
+FVG_EXPIRY_CANDLES=10     # invalidate setup after N candles without fill
+SL_BUFFER=0               # extra buffer below/above FVG zone for SL (price units)
+MIN_RR=1.5                # minimum reward:risk ratio
+
+# ── Friction ─────────────────────────────────────────────────────────────────
+COMMISSION_PER_LOT=7      # round-trip commission in USD
+SLIPPAGE_POINTS=5         # extra SL slippage in MT5 points
+SPREAD_OVERRIDE=0         # override spread (0 = Zero/Raw account)
+
+# ── EMA Trend Filter ─────────────────────────────────────────────────────────
+EMA_PERIOD=20             # 0 = disabled