feat(user): 昵称上限放宽到 20 字(与客户端/原型一致) (#63)

Co-authored-by: zzhyyyyy <2685922758@qq.com>
Reviewed-on: #63
Co-authored-by: zhuzihao <zhuzihao@wonderable.ai>
Co-committed-by: zhuzihao <zhuzihao@wonderable.ai>

app/models/ad_feed_reward.py

@@ -30,6 +30,9 @@ class AdFeedRewardRecord(Base):
     ecpm_raw: Mapped[str] = mapped_column(String(32), nullable=False)
     adn: Mapped[str | None] = mapped_column(String(32), nullable=True)
     slot_id: Mapped[str | None] = mapped_column(String(64), nullable=True)
+    # 点位场景:comparison(比价等待) / coupon(领券) / welfare(福利页)。比价与领券共用同一信息流
+    # 代码位,slot_id/our_code_id 分不出,只能客户端各调用点显式打标;NULL=历史/未升级客户端=未分类。
+    feed_scene: Mapped[str | None] = mapped_column(String(16), nullable=True)
     # 来源(广告收益报表用):我们的应用环境 prod/test + 我们配置的代码位 104xxx,由客户端 feed-reward 上报带上。旧数据为 NULL。
     app_env: Mapped[str | None] = mapped_column(String(16), nullable=True)
     our_code_id: Mapped[str | None] = mapped_column(String(64), nullable=True)