feat: support basic user system

db/migration/000002_v2.up.sql

@@ -0,0 +1,77 @@
+-- new user table
+CREATE TABLE IF NOT EXISTS users
+(
+    id             uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    username       text NOT NULL UNIQUE,
+    password       text NOT NULL,
+    role           text NOT NULL, -- admin user
+    display_name   text NOT NULL,
+    account_status text NOT NULL    DEFAULT 'active',
+    last_login_at  timestamptz,
+    created_at     timestamptz      DEFAULT now()
+);
+
+-- add user reference to data_assets
+ALTER TABLE data_assets
+    ADD COLUMN IF NOT EXISTS user_id uuid REFERENCES users (id);
+
+-- add agent columns to data_assets
+ALTER TABLE data_assets
+    ADD COLUMN IF NOT EXISTS agent_asset_summary text;
+COMMENT ON COLUMN data_assets.agent_asset_summary IS '智能助手对当前资产的简短画像总结';
+
+ALTER TABLE data_assets
+    ADD COLUMN IF NOT EXISTS agent_recommended_tasks jsonb;
+COMMENT ON COLUMN data_assets.agent_recommended_tasks IS '推荐的适用任务列表';
+
+ALTER TABLE data_assets
+    ADD COLUMN IF NOT EXISTS agent_risk_per_mission_advice text;
+COMMENT ON COLUMN data_assets.agent_risk_per_mission_advice IS '当前资产更适合的权限与风险建议';
+
+ALTER TABLE data_assets
+    ADD COLUMN IF NOT EXISTS agent_asset_explanation text;
+COMMENT ON COLUMN data_assets.agent_asset_explanation IS '为什么该资产当前基础价值较高/中/低';
+
+-- add user reference to buyer_requests
+ALTER TABLE buyer_requests
+    ADD COLUMN IF NOT EXISTS user_id uuid REFERENCES users (id);
+
+-- add agent to pricing_results
+ALTER TABLE pricing_results
+    ADD COLUMN IF NOT EXISTS agent_task_match_explanation text;
+COMMENT ON COLUMN pricing_results.agent_task_match_explanation IS '解释当前数据与任务的匹配关系';
+
+ALTER TABLE pricing_results
+    ADD COLUMN IF NOT EXISTS agent_risk_advice text;
+COMMENT ON COLUMN pricing_results.agent_risk_advice IS '解释当前隐私风险与权限建议';
+
+ALTER TABLE pricing_results
+    ADD COLUMN IF NOT EXISTS agent_budget_advice text;
+COMMENT ON COLUMN pricing_results.agent_budget_advice IS '根据预算给出的建议';
+
+ALTER TABLE pricing_results
+    ADD COLUMN IF NOT EXISTS agent_next_action text;
+COMMENT ON COLUMN pricing_results.agent_next_action IS '建议接下来做什么';
+
+-- add agent to
+ALTER TABLE validations
+    ADD COLUMN IF NOT EXISTS agent_validation_explanation text;
+COMMENT ON COLUMN validations.agent_validation_explanation IS '对当前验证结果的自然语言解释';
+
+ALTER TABLE validations
+    ADD COLUMN IF NOT EXISTS agent_continue_trade_advice text;
+COMMENT ON COLUMN validations.agent_continue_trade_advice IS '对是否继续成交的建议';
+
+ALTER TABLE validations
+    ADD COLUMN IF NOT EXISTS agent_delivery_advice text;
+COMMENT ON COLUMN validations.agent_delivery_advice IS '对交付方式的建议';
+
+ALTER TABLE validations
+    ADD COLUMN IF NOT EXISTS agent_risk_notice text;
+COMMENT ON COLUMN validations.agent_risk_notice IS '对后续交易的风险提示';
+
+-- add user to order
+ALTER TABLE orders
+    ADD COLUMN IF NOT EXISTS user_id uuid REFERENCES users (id);
+
+