保留最新代码，清除历史记录

deploy/sql/02_create_user_table.sql

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+-- 切换到目标数据库
+\c postgres;
+
+CREATE OR REPLACE FUNCTION update_user_modified_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = CURRENT_TIMESTAMP;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql VOLATILE;
+
+DO $$
+BEGIN
+    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'user') THEN
+        CREATE TABLE "user" (  -- user是关键字，用双引号包裹
+            id UUID DEFAULT gen_random_uuid_v7() PRIMARY KEY NOT NULL,
+            deleted BOOLEAN NOT NULL DEFAULT FALSE,
+            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
+        );
+        CREATE TRIGGER update_user_updated_at
+        BEFORE UPDATE ON "user"
+        FOR EACH ROW
+        EXECUTE FUNCTION update_user_modified_column();
+        
+        RAISE NOTICE 'Created user table and trigger';
+    ELSE
+        RAISE NOTICE 'user table already exists';
+    END IF;
+END $$;