feat(invite): 被邀请人列表接口 + 指纹归因(任务3) (#31)

- GET /invitees: 分页 + 名字降级兜底(昵称→微信昵称→脱敏手机号)
- 指纹归因: 落地页采集 + (IP,设备型号)反查撞库 + 时间窗口闸
- test_invite: +5 个列表测试(脱敏/倒序/昵称优先/分页/空), 修指纹测试跨用例串味

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Reviewed-on: #31
Co-authored-by: xiebing <xiebing@wonderable.ai>
Co-committed-by: xiebing <xiebing@wonderable.ai>

app/models/__init__.py

@@ -13,6 +13,7 @@ from app.models.coupon_state import (  # noqa: F401
 )
 from app.models.feedback import Feedback  # noqa: F401
 from app.models.invite import InviteRelation  # noqa: F401
+from app.models.invite_fingerprint import InviteFingerprint  # noqa: F401
 from app.models.meituan_coupon import MeituanCoupon  # noqa: F401
 from app.models.ops_marquee_seed import OpsMarqueeSeed  # noqa: F401
 from app.models.ops_stat_config import OpsStatConfig  # noqa: F401

app/models/invite_fingerprint.py

@@ -0,0 +1,46 @@
+"""邀请指纹归因表(剪贴板归因兜底)。
+
+数据流(对应 [[invite-three-tasks]] 任务 3):
+  1. B 浏览器打开落地页 dl.html?ref=邀请码 → JS POST /api/v1/invite/landing-track
+  2. 后端从 HTTP 头拿 IP/UA,解析 UA 得 device_model,跟 JS 上报的 screen 一起入库
+  3. B 装包首启 → 登录后,若剪贴板没拿到邀请码(被覆盖),客户端再算一次 screen+Build.MODEL
+     上报 → 后端用 (ip, screen, device_model) 反查本表 7 天内最近匹配 → 拿出 inviter_user_id
+     → 走原 bind 路径(channel=fingerprint)
+
+不要索引(IP, created_at) 单独,组合索引 (ip, screen, device_model, created_at desc) 反查更省。
+"""
+from __future__ import annotations
+
+from datetime import datetime
+
+from sqlalchemy import DateTime, ForeignKey, Integer, String, Text, func
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.db.base import Base
+
+
+class InviteFingerprint(Base):
+    __tablename__ = "invite_fingerprint"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    inviter_user_id: Mapped[int] = mapped_column(
+        Integer, ForeignKey("user.id"), index=True, nullable=False
+    )
+    # 落地页访问者 IP(服务端从 HTTP 头拿,X-Forwarded-For 由部署侧 nginx 透传)
+    ip: Mapped[str] = mapped_column(String(64), nullable=False)
+    # 客户端 Build.MODEL / 浏览器 UA 解析出来的型号(如 "PJF110"、"23046PNC9C")
+    device_model: Mapped[str] = mapped_column(String(64), nullable=False, default="")
+    # 屏幕分辨率 "1080x2400"(浏览器 screen.width × height,客户端 DisplayMetrics)
+    screen: Mapped[str] = mapped_column(String(32), nullable=False, default="")
+    # 完整 UA 字符串(留 debug / 排查"匹配不上"用,不直接参与匹配)
+    user_agent: Mapped[str] = mapped_column(Text, nullable=False, default="")
+
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), server_default=func.now(), index=True, nullable=False
+    )
+
+    def __repr__(self) -> str:  # pragma: no cover
+        return (
+            f"<InviteFingerprint inviter={self.inviter_user_id} "
+            f"ip={self.ip} model={self.device_model} screen={self.screen}>"
+        )