feat(database,events): 在用户模型中添加事件关系

- 在 User 类中添加了 events 字段，用于存储用户相关的事件
- 通过 Relationship 建立了用户和事件之间的关系
- 引入了 Event 模型以支持事件相关操作

app/database/events.py

@@ -0,0 +1,54 @@
+from __future__ import annotations
+
+from datetime import datetime
+from enum import Enum
+import json
+
+from app.database.lazer_user import User
+
+from sqlmodel import Field, Relationship, SQLModel
+
+
+class EventType(str, Enum):
+    ACHIEVEMENT = "achievement"
+    BEATMAP_PLAYCOUNT = "beatmap_playcount"
+    BEATMAPSET_APPROVE = "beatmapset_approve"
+    BEATMAPSET_DELETE = "beatmapset_delete"
+    BEATMAPSET_REVIVE = "beatmapset_revive"
+    BEATMAPSET_UPDATE = "beatmapset_update"
+    BEATMAPSET_UPLOAD = "beatmapset_upload"
+    RANK = "rank"
+    RANK_LOST = "rank_lost"
+    # 鉴于本服务器没有 supporter 这一说，这三个字段没有必要
+    # USER_SUPPORT_AGAIN="user_support_again"
+    # USER_SUPPORT_FIRST="user_support"
+    # USER_SUPPORT_GIFT="user_support_gift"
+    USERNAME_CHANGE = "username_change"
+
+
+class EventBase(SQLModel):
+    id: int = Field(default=None, primary_key=True)
+    createdAt: datetime
+    type: EventType
+    event_payload: str
+
+
+class Event(EventBase, table=True):
+    __tablename__ = "user_events"  # pyright: ignore[reportAssignmentType]
+    user_id: int | None = Field(default=None, foreign_key="lazer_users.id")
+    user: User = Relationship(back_populates="events")
+
+
+class EventResp(EventBase):
+    _payload: dict
+
+    def merge_payload(self) -> "EventResp":
+        parsed = {}
+        try:
+            parsed = json.loads(self.event_payload or "{}")
+        except json.JSONDecodeError:
+            parsed = {}
+        for key, value in parsed.items():
+            setattr(self, key, value)
+        self._payload = parsed
+        return self