feat(core): register TaxRate model

app/models/__init__.py

@@ -5,6 +5,7 @@ from app.models.auth import ApiToken, PasswordResetToken
 from app.models.company import Company
 from app.models.contact import CompanyContact, Contact
 from app.models.currency import Currency
+from app.models.tax import TaxRate
 from app.models.notification import Notification
 from app.models.plugin import Plugin, PluginMigration
 from app.models.role import Role
@@ -27,6 +28,8 @@ __all__ = [
     "Contact",
     "CompanyContact",
     "Currency",
+    "TaxRate",
+    "TaxRate",
     "Plugin",
     "PluginMigration",
 ]