fix(ledger): preserve exact decimal amount in manual and unified responses

Co-authored-by: genichin <4282227+genichin@users.noreply.github.com>

app/domain/models.py

@@ -4,6 +4,7 @@ from __future__ import annotations
 
 from dataclasses import dataclass, field
 from datetime import datetime
+from decimal import Decimal
 from enum import Enum
 from typing import Any, Protocol, runtime_checkable
 
@@ -136,6 +137,7 @@ class LedgerEntry:
     portfolio_id: str
     quantity: float
     price: float
+    price_decimal: Decimal | None = None
     ledger_entry_id: int = 0
     order_id: str | None = None
     execution_id: str | None = None
@@ -195,4 +197,3 @@ class BrokerCredential:
     credential_version: int = 1
     last_rotated_at: datetime | None = None
     daemon_id: str | None = None
-