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

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

app/api/v1_portfolios.py

@@ -16,6 +16,7 @@ import json
 import logging
 import uuid
 from datetime import date, datetime, timedelta, timezone
+from decimal import Decimal
 
 from fastapi import APIRouter, Depends, HTTPException, Query, Response, status
 
@@ -687,7 +688,11 @@ def record_ledger_trade_v1(
 
 def _manual_entry_to_response(entry) -> ManualLedgerResponse:
     action = (entry.action or entry.side or "").upper()
-    amount = entry.price if action in {"INVEST", "BUFFER_OUT", "BUFFER_IN", "WITHDRAW", "PROFIT", "DIVIDEND"} else None
+    amount = (
+        (entry.price_decimal if entry.price_decimal is not None else Decimal(str(entry.price)))
+        if action in {"INVEST", "BUFFER_OUT", "BUFFER_IN", "WITHDRAW", "PROFIT", "DIVIDEND"}
+        else None
+    )
     return ManualLedgerResponse(
         ledger_entry_id=entry.ledger_entry_id,
         portfolio_id=entry.portfolio_id,
@@ -786,6 +791,9 @@ def _decode_ledger_cursor(cursor: str, *, portfolio_id: str, source: str | None)
 
 def _ledger_entry_to_history_item(entry) -> LedgerHistoryItem:
     action = (entry.action or entry.side or "").upper()
+    amount = None
+    if action in {"INVEST", "BUFFER_OUT", "BUFFER_IN", "WITHDRAW", "PROFIT", "DIVIDEND"}:
+        amount = entry.price_decimal if entry.price_decimal is not None else Decimal(str(entry.price))
     return LedgerHistoryItem(
         ledger_entry_id=entry.ledger_entry_id,
         portfolio_id=entry.portfolio_id,
@@ -796,7 +804,7 @@ def _ledger_entry_to_history_item(entry) -> LedgerHistoryItem:
         order_id=entry.order_id,
         execution_id=entry.execution_id,
         quantity=entry.quantity,
-        amount=entry.price if action in {"INVEST", "BUFFER_OUT", "BUFFER_IN", "WITHDRAW", "PROFIT", "DIVIDEND"} else None,
+        amount=amount,
         price=entry.price,
         fee_amount=entry.fee_amount,
         tax_amount=entry.tax_amount,