Add monitoring TG service

alembic/versions/0004_add_extracted.py

@@ -0,0 +1,34 @@
+"""add extracted JSONB column to messages
+
+Revision ID: 0004
+Revises: 0003
+Create Date: 2026-05-05
+
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.dialects import postgresql
+
+revision: str = "0004"
+down_revision: Union[str, None] = "0003"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "messages",
+        sa.Column("extracted", postgresql.JSONB(), nullable=True),
+    )
+    # GIN index for json queries (e.g. filter by extracted->'real_estate'->>'kind').
+    op.execute(
+        "CREATE INDEX IF NOT EXISTS ix_messages_extracted_gin "
+        "ON messages USING GIN (extracted)"
+    )
+
+
+def downgrade() -> None:
+    op.execute("DROP INDEX IF EXISTS ix_messages_extracted_gin")
+    op.drop_column("messages", "extracted")