Add migration for notifications create_on row (#382)

### Description

Add migration for #371

### Checklist

- [ ] Created tests which fail without the change (if possible)
- [x] All tests passing
- [ ] Extended the documentation, if necessary

---------

Co-authored-by: Petitoto <[email protected]>

migrations/versions/7-notifications_create_on.py

@@ -0,0 +1,34 @@
+"""Notifications 'create_on' migration
+
+Revision ID: e3d06397960d
+Revises: 6afc765adaa2
+Create Date: 2024-03-17 19:19:14.297195
+
+"""
+
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "e3d06397960d"
+down_revision: str | None = "6afc765adaa2"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    op.alter_column(
+        "notification_message",
+        "expire_on",
+        type_=sa.DateTime(timezone=False),
+    )
+
+
+def downgrade() -> None:
+    op.alter_column(
+        "notification_message",
+        "expire_on",
+        type_=sa.Date(),
+    )