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>

src/coinhunter/services/trade_service.py

@@ -112,7 +112,7 @@ def execute_spot_trade(
         dry_run=is_dry_run,
     )
 
-    audit_event("trade_submitted", _trade_log_payload(intent, payload, status="submitted"))
+    audit_event("trade_submitted", _trade_log_payload(intent, payload, status="submitted"), dry_run=intent.dry_run)
     if is_dry_run:
         response = {"dry_run": True, "status": "DRY_RUN", "request": payload}
         result = asdict(
@@ -128,14 +128,14 @@ def execute_spot_trade(
             )
         )
         audit_event(
-            "trade_filled", {**_trade_log_payload(intent, payload, status="DRY_RUN"), "response_payload": response}
+            "trade_filled", {**_trade_log_payload(intent, payload, status="DRY_RUN"), "response_payload": response}, dry_run=intent.dry_run
         )
         return {"trade": result}
 
     try:
         response = spot_client.new_order(**payload)
     except Exception as exc:
-        audit_event("trade_failed", _trade_log_payload(intent, payload, status="failed", error=str(exc)))
+        audit_event("trade_failed", _trade_log_payload(intent, payload, status="failed", error=str(exc)), dry_run=intent.dry_run)
         raise RuntimeError(f"Spot order failed: {exc}") from exc
 
     result = asdict(
@@ -151,6 +151,7 @@ def execute_spot_trade(
         )
     )
     audit_event(
-        "trade_filled", {**_trade_log_payload(intent, payload, status=result["status"]), "response_payload": response}
+        "trade_filled", {**_trade_log_payload(intent, payload, status=result["status"]), "response_payload": response},
+        dry_run=intent.dry_run,
     )
     return {"trade": result}