feat: split audit logs into live/dryrun subdirs, add catlog --dry-run, list all kline intervals

- Write live trades to logs/live/ and dry-run trades to logs/dryrun/
- Add -d/--dry-run flag to catlog to read dry-run audit logs
- List all 16 Binance kline interval options in --help and docs

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

tests/test_trade_service.py

@@ -21,7 +21,7 @@ class TradeServiceTestCase(unittest.TestCase):
     def test_spot_market_buy_dry_run_does_not_call_client(self):
         events = []
         with patch.object(
-            trade_service, "audit_event", side_effect=lambda event, payload: events.append((event, payload))
+            trade_service, "audit_event", side_effect=lambda event, payload, **kwargs: events.append((event, payload))
         ):
             client = FakeSpotClient()
             payload = trade_service.execute_spot_trade(