malkhut(fix): CORRECT FEE BUG — taker 0.5→5.0, maker -0.2→+2.0

Fable's spec (SPEC_MALKHUT_ACTUALS_INTAKE.md) confirmed 10x fee error
from our own fills (dolphin.trade_execution_quality).

Fixed:
- BingX taker: 0.5 → 5.0 bps
- BingX maker: -0.2 → +2.0 bps (POSITIVE on BingX, not a rebate)
- Binance taker: 0.4 → 4.5 bps
- Bybit taker: 0.06 → 5.5 bps
- All 13 per-asset profiles: maker=-0.2 taker=0.5 → maker=2.0 taker=5.0

Source of truth: dolphin.trade_execution_quality (8006 rows, avg taker=5.016 bps).
Every policy trained before this fix was at 10x too-cheap fees.
Re-measurement at correct fees is required.

MALKHUT/malkhut/tests/test_asset_classification.py

@@ -297,8 +297,8 @@ class TestBTCProfile:
 
     def test_fees(self):
         p = get_asset_profile("BTCUSDT")
-        assert p.maker_fee_bps == -0.2
-        assert p.taker_fee_bps == 0.5
+        assert p.maker_fee_bps == 2.0
+        assert p.taker_fee_bps == 5.0
 
     def test_orderbook(self):
         p = get_asset_profile("BTCUSDT")
@@ -455,8 +455,8 @@ class TestBNBProfile:
 
     def test_lower_fees(self):
         p = get_asset_profile("BNBUSDT")
-        assert p.maker_fee_bps == -0.1
-        assert p.taker_fee_bps == 0.4
+        assert p.maker_fee_bps == 2.0
+        assert p.taker_fee_bps == 5.0
 
     def test_is_gas(self):
         assert get_asset_profile("BNBUSDT").is_gas_token
@@ -738,8 +738,8 @@ class TestProfileFieldValidation:
 
     def test_fee_bps_reasonable(self):
         for p in ASSET_PROFILES.values():
-            assert -1.0 <= p.maker_fee_bps <= 1.0
-            assert 0.0 <= p.taker_fee_bps <= 2.0
+            assert 0.0 <= p.maker_fee_bps <= 10.0
+            assert 0.0 <= p.taker_fee_bps <= 10.0
             assert p.taker_fee_bps >= p.maker_fee_bps
 
     def test_depth_usd_positive(self):