Drop workflow kinds, deliver reviews when done, rename/delete workflows

internal/store/migrations/073-drop-workflow-kind.sql

@@ -0,0 +1,11 @@
+UPDATE workflows SET definition = json_remove(definition, '$.kind')
+WHERE json_type(definition, '$.kind') IS NOT NULL;
+
+UPDATE tasks SET workflow_definition = json_remove(workflow_definition, '$.kind')
+WHERE workflow_definition != '' AND json_type(workflow_definition, '$.kind') IS NOT NULL;
+
+UPDATE reviews SET definition = json_remove(definition, '$.kind')
+WHERE definition != '' AND json_type(definition, '$.kind') IS NOT NULL;
+
+UPDATE events SET payload = json_set(payload, '$.kept', json_array(task_id))
+WHERE kind = 'task.workflow_finished' AND json_type(payload, '$.kept') IS NULL;

internal/store/migrations/074-one-review-per-stage.sql

@@ -0,0 +1,25 @@
+CREATE TABLE reviews_next (
+	id TEXT PRIMARY KEY,
+	task_id TEXT NOT NULL REFERENCES tasks(id),
+	snapshot_n INTEGER NOT NULL,
+	agent_session_id TEXT REFERENCES agent_sessions(id),
+	vendor TEXT NOT NULL,
+	model TEXT NOT NULL,
+	state TEXT NOT NULL,
+	result TEXT NOT NULL DEFAULT '',
+	error TEXT NOT NULL DEFAULT '',
+	created_at TEXT NOT NULL,
+	finished_at TEXT NOT NULL DEFAULT '',
+	finding_states TEXT NOT NULL DEFAULT '{}',
+	finding_responses TEXT NOT NULL DEFAULT '{}',
+	stage TEXT NOT NULL DEFAULT '',
+	definition TEXT NOT NULL DEFAULT '',
+	UNIQUE (task_id, snapshot_n, stage)
+);
+
+INSERT INTO reviews_next (id, task_id, snapshot_n, agent_session_id, vendor, model, state, result, error, created_at, finished_at, finding_states, finding_responses, stage, definition)
+SELECT id, task_id, snapshot_n, agent_session_id, vendor, model, state, result, error, created_at, finished_at, finding_states, finding_responses, stage, definition FROM reviews;
+
+DROP TABLE reviews;
+ALTER TABLE reviews_next RENAME TO reviews;
+CREATE UNIQUE INDEX reviews_session ON reviews(agent_session_id);