Add monitoring TG service

alembic/versions/0009_add_section_access_code.py

@@ -0,0 +1,24 @@
+"""add access code to sections
+
+Revision ID: 0009
+Revises: 0008
+Create Date: 2026-05-29
+
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "0009"
+down_revision: Union[str, None] = "0008"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column("sections", sa.Column("access_code", sa.String(length=255), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("sections", "access_code")