Refactoring part 1

Some changes for workers, but stopped due to refactoring

common/utils/security.py

@@ -0,0 +1,18 @@
+from flask import session
+from common.models import User, Tenant
+
+
+# Definition of Trigger Handlers
+def set_tenant_session_data(sender, user, **kwargs):
+    tenant = Tenant.query.filter_by(id=user.tenant_id).first()
+    session['tenant'] = tenant.to_dict()
+    session['default_language'] = tenant.default_language
+    session['default_embedding_model'] = tenant.default_embedding_model
+    session['default_llm_model'] = tenant.default_llm_model
+
+
+def clear_tenant_session_data(sender, user, **kwargs):
+    session.pop('tenant', None)
+    session.pop('default_language', None)
+    session.pop('default_embedding_model', None)
+    session.pop('default_llm_model', None)