feat: improve chat feedback navigation

ai_knowledge_base_v2/apps/backend/alembic/versions/0043_chat_message_navigation_index.py

@@ -0,0 +1,25 @@
+"""add chat message navigation index
+
+Revision ID: 0043_chat_msg_nav_index
+Revises: 0042_record_export_permission
+"""
+
+from alembic import op
+
+
+revision = "0043_chat_msg_nav_index"
+down_revision = "0042_record_export_permission"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_index(
+        "ix_chat_message_session_created_id",
+        "sys_chat_message",
+        ["session_id", "created_at", "id"],
+    )
+
+
+def downgrade() -> None:
+    op.drop_index("ix_chat_message_session_created_id", table_name="sys_chat_message")