fix corporate action runtime blockers

app/api/v1_portfolios.py

@@ -24,6 +24,7 @@ from app.core.auth import AuthContext, Permission, require_read, require_trade_w
 from app.core.config import get_settings
 from app.domain.errors import DaemonInactiveError, DaemonNotFoundError
 from app.domain.models import CorporateAction, Portfolio, PortfolioComment
+from app.domain.services import PORTFOLIO_NOT_FOUND_MESSAGE
 from app.domain.pnl import calculate_current_wac, calculate_realized_pnl
 from app.repositories.factory import get_portfolio_repository_from_settings
 from app.schemas.v1 import (
@@ -1332,7 +1333,7 @@ def create_corporate_action(portfolio_id: str, payload: CorporateActionRequest,
         return CorporateActionResponse(**saved.__dict__)
     except ValueError as exc:
         code = str(exc)
-        if code == "portfolio not found":
+        if code == PORTFOLIO_NOT_FOUND_MESSAGE:
             raise HTTPException(status_code=404, detail="Portfolio not found") from exc
         raise HTTPException(status_code=409 if code.startswith(("IDEMPOTENCY", "CORPORATE_ACTION_")) else 400, detail=code) from exc
     finally: