Refactor code for improved readability and consistency

- Consolidated multiline string formatting into single-line for SQL queries in multiple files.
- Adjusted argument formatting in function calls for better alignment and readability.
- Removed unnecessary line breaks and improved spacing in various sections of the codebase.
- Updated test cases to maintain consistency in formatting and improve clarity.

scripts/backtest_replay.py

@@ -19,10 +19,12 @@ def _resolve_fee_rate(fee_rate: float | None, db_path: str | None = None) -> flo
     if db_path is not None:
         try:
             conn = duckdb.connect(db_path)
-            row = conn.execute("""
+            row = conn.execute(
+                """
                 SELECT maker_fee FROM kraken_account_snapshots
                 ORDER BY snapshot_at DESC LIMIT 1
-            """).fetchone()
+            """
+            ).fetchone()
             conn.close()
             if row is not None and row[0] is not None:
                 return float(row[0])
@@ -51,16 +53,14 @@ def _parse_balances(raw: str) -> Mapping[str, float]:
 
 
 def main() -> int:
-    parser = argparse.ArgumentParser(
-        description="Run a deterministic replay backtest.")
+    parser = argparse.ArgumentParser(description="Run a deterministic replay backtest.")
     parser.add_argument("--events", type=Path, required=True)
     parser.add_argument("--starting-balances", type=str, default="USD=1000.0")
     parser.add_argument("--trade-capital", type=float, default=100.0)
     parser.add_argument("--fee-rate", type=float, default=None)
     parser.add_argument("--slippage-bps", type=float, default=4.0)
     parser.add_argument("--execution-latency-ms", type=float, default=20.0)
-    parser.add_argument("--db-path", type=str, default=None,
-                        help="DuckDB path for fee lookup")
+    parser.add_argument("--db-path", type=str, default=None, help="DuckDB path for fee lookup")
     args = parser.parse_args()
 
     cycles_by_pair, available_pairs = _build_graph()
@@ -80,18 +80,15 @@ def main() -> int:
         started_at=events[0].occurred_at if events else datetime.now(UTC),
     )
     report = asyncio.run(
-        engine.run(events, starting_balances=_parse_balances(
-            args.starting_balances))
+        engine.run(events, starting_balances=_parse_balances(args.starting_balances))
     )
 
     print("Backtest report:")
     print(f"- processed_events: {report.processed_events}")
     print(f"- opportunities_seen: {report.opportunities_seen}")
     print(f"- trades_executed: {report.trades_executed}")
-    print(
-        f"- win_rate: {report.win_rate if report.win_rate is not None else 'n/a'}")
-    print(
-        f"- fill_rate: {report.fill_rate if report.fill_rate is not None else 'n/a'}")
+    print(f"- win_rate: {report.win_rate if report.win_rate is not None else 'n/a'}")
+    print(f"- fill_rate: {report.fill_rate if report.fill_rate is not None else 'n/a'}")
     print(f"- realized_pnl_usd: {report.realized_pnl_usd:.4f}")
     print(f"- max_drawdown_usd: {report.max_drawdown_usd:.4f}")
     print(f"- miss_reasons: {dict(report.miss_reasons)}")