feat(core): register Currency model

app/models/__init__.py

@@ -4,6 +4,7 @@ from app.models.audit import AuditLog, DeletionLog
 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.notification import Notification
 from app.models.plugin import Plugin, PluginMigration
 from app.models.role import Role
@@ -25,6 +26,7 @@ __all__ = [
     "Company",
     "Contact",
     "CompanyContact",
+    "Currency",
     "Plugin",
     "PluginMigration",
 ]
@@ -45,6 +47,7 @@ __all__ = [
     "Company",
     "Contact",
     "CompanyContact",
+    "Currency",
     "Plugin",
     "PluginMigration",
     "AIConversation",