The search_path was changed from kanzlai to mgmt but seed files
still referenced the old schema. Also added missing is_spawn and
spawn_label columns to mgmt.deadline_rules via direct DB migration.
Root cause of timeline 404 / calculate+determine 400: the ruleColumns
query selected is_spawn and spawn_label which didn't exist in the
mgmt.deadline_rules table, causing all deadline rule queries to fail.