text: -- This migration adds the schema notification table
  -- 
  -- NOTE: In OSS this table only contains a single row (indicated by ID 1).
  --       This may change to allow multiple notifications in future.
  CREATE TABLE hdb_catalog.hdb_schema_notifications
  (
    id INTEGER PRIMARY KEY CHECK (id = 1),
    notification JSON NOT NULL,
    resource_version INTEGER NOT NULL DEFAULT 1,
    instance_id UUID NOT NULL,
    updated_at TIMESTAMPTZ DEFAULT NOW()
  );
  