statuses update

db/init.sql

@@ -5,7 +5,7 @@ CREATE TABLE IF NOT EXISTS results (
     analysis       JSONB,
     tagging        JSONB,
     metadata       JSONB,
-    status         TEXT NOT NULL DEFAULT 'pending',
+    status         TEXT NOT NULL DEFAULT 'pending', -- pending | in_progress | done | error
     created_at     TIMESTAMPTZ NOT NULL DEFAULT now(),
     updated_at     TIMESTAMPTZ NOT NULL DEFAULT now()
 );