feat(feedback): 补齐反馈历史审核发奖闭环

- 新增反馈审核字段和迁移，支持 pending/adopted/rejected、未采纳原因和采纳金币

- 增加用户端反馈历史 records 接口和 admin 采纳/拒绝接口

- 采纳时同事务写状态、金币流水和审计日志，拦截重复审核

- 验证：pytest tests/test_feedback.py tests/test_admin_write.py tests/test_admin_read.py

tests/test_admin_read.py

@@ -49,7 +49,7 @@ def _seed_user_with_data(phone: str) -> int:
         db.add(WithdrawOrder(
             user_id=uid, out_bill_no=f"test{uid}billno0001", amount_cents=100, status="success"
         ))
-        db.add(Feedback(user_id=uid, content="测试反馈内容", contact="wx_test", status="new"))
+        db.add(Feedback(user_id=uid, content="测试反馈内容", contact="wx_test", status="pending"))
         db.commit()
         return uid
     finally:
@@ -181,9 +181,11 @@ def test_wallet_and_withdraw_lists(admin_client: TestClient, admin_token: str) -
 
 def test_feedback_list(admin_client: TestClient, admin_token: str) -> None:
     _seed_user_with_data("13800000005")
-    r = admin_client.get("/admin/api/feedbacks", params={"status": "new"}, headers=_auth(admin_token))
+    r = admin_client.get(
+        "/admin/api/feedbacks", params={"status": "pending"}, headers=_auth(admin_token)
+    )
     assert r.status_code == 200
-    assert all(f["status"] == "new" for f in r.json()["items"])
+    assert all(f["status"] == "pending" for f in r.json()["items"])
 
 
 def test_ad_coin_audit_full_count_truncate_and_only_mismatch(