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_opportunity_service.py

@@ -122,7 +122,7 @@ class OpportunityServiceTestCase(unittest.TestCase):
 
     def test_portfolio_analysis_ignores_dust_and_emits_recommendations(self):
         events = []
-        with patch.object(opportunity_service, "audit_event", side_effect=lambda event, payload: events.append(event)):
+        with patch.object(opportunity_service, "audit_event", side_effect=lambda event, payload, **kwargs: events.append(event)):
             payload = opportunity_service.analyze_portfolio(self.config, spot_client=FakeSpotClient())
         symbols = [item["symbol"] for item in payload["recommendations"]]
         self.assertNotIn("DOGEUSDT", symbols)