init push

backend/store/pg/migration/000016_create_document_feedback.up.sql

@@ -0,0 +1,10 @@
+CREATE TABLE IF NOT EXISTS document_feedbacks (
+    id BIGSERIAL PRIMARY KEY,
+    user_id TEXT NULL,
+    kb_id TEXT NOT NULL,
+    node_id TEXT NOT NULL DEFAULT '',
+    content TEXT NOT NULL DEFAULT '', 
+    correction_suggestion TEXT NOT NULL DEFAULT '',
+    info JSONB DEFAULT '{}',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);