feat: asset catalog API, 태그 DB 기초, 마이그레이션 3건 및 도메인/테스트 갱신 (2026-05-19)

tests/test_portfolio_uuid.py

@@ -10,7 +10,7 @@ from typer.testing import CliRunner
 
 from app.cli.main import create_app
 from app.core.config import Settings
-from app.domain.models import LedgerEntry, Portfolio, PortfolioComment, PortfolioTag, StrategySet, User
+from app.domain.models import Asset, LedgerEntry, Portfolio, PortfolioComment, PortfolioTag, StrategySet, User
 
 
 class FakeRepo:
@@ -110,10 +110,10 @@ class FakeRepo:
         return portfolio
 
     def get_asset_by_id(self, asset_id: str):
-        return None
+        return Asset(asset_id=asset_id, symbol="TEST", markets=[], status="active")
 
     def get_asset_by_symbol(self, symbol: str):
-        return None
+        return Asset(asset_id=_TEST_ASSET_ID, symbol=symbol, markets=[], status="active")
 
     def list_assets(self):
         return []