refactor: 以 bzzoiro 为唯一数据源的全面重构

数据源统一为 bzzoiro,移除 Understat 与 injuries:
- 删除 src/data/understat.py / injuries.py 及相关测试
- 删除 injuries 模型与表;扩展 match_stats(xG 之外增加 big_chances/fouls)
- 新增 standings 表(联赛积分榜:位置/积分/xG/走势/分区)
- matches 表增加 source_event_id 血缘列,支撑统计回填

采集管线(bzzoiro 三条管线):
- events:赛程/比分(/events/),记录 source_event_id
- standings:积分榜快照(/leagues/{id}/standings/)
- stats:已完赛比赛详细统计回填(/events/{id}/stats/)

预测增强:
- standings_slice 替代 injuries_slice;积分榜专家替代阵容完整性专家
- AGENT_META runtime_config 同步更新

管理后台:
- ingest 路由重写为单一 bzzoiro 入口 + task 参数(events/standings/stats/all)
- 新增 /admin/data-completeness 数据完整性分析 API
- 数据源状态页简化为 bzzoiro 单源

前端:
- 采集页重构为任务驱动(比赛/积分榜/统计回填/全量)
- 新增「数据完整性」可视化页(覆盖率矩阵/字段完整率/健康摘要)
- 新增主站积分榜页(/standings)与比赛详情完整统计面板
- agent 名称同步更新(injuries→standings)

迁移 0015_bzzoiro_single_source 已在容器内验证通过,后端测试全部通过。

Co-Authored-By: new-provider/LongCat-2.0 <<EMAIL>>

src/api/schemas.py

@@ -29,6 +29,8 @@ class MatchOut(BaseModel):
     match_stage: str | None
     home_xg: float | None = None
     away_xg: float | None = None
+    # 比赛详细统计(bzzoiro /events/{id}/stats/),无统计为 None
+    stats: dict | None = None
     # 该场比赛的最近预测摘要(按时间倒序,最多 5 条;无预测为空)
     recent_predictions: list[PredictionOut] = []
 
@@ -107,6 +109,9 @@ class IngestBzzoiroRequest(BaseModel):
     date_from: str | None = None
     date_to: str | None = None
     status: str | None = Field(None, description="finished/scheduled;空 = 两者都采集")
+    task: str = Field("events", description="采集任务: events(比赛)/standings(积分榜)/stats(统计回填)/all")
+    limit: int = Field(100, ge=1, le=500, description="stats 回填单次最大比赛数")
+    season: str | None = Field(None, description="standings 赛季,如 '2026-2027';空 = 当前赛季")
 
 
 class IngestResponse(BaseModel):
@@ -116,23 +121,6 @@ class IngestResponse(BaseModel):
     errors: list[str] = []
 
 
-class IngestUnderstatRequest(BaseModel):
-    league: str | None = Field(None, description="联赛代码,如 'E0';空 = 全部已知联赛")
-    season: int = Field(default_factory=lambda: date.today().year, description="赛季起始年,如 2025 表示 2025-2026 赛季")
-
-
-class IngestInjuriesRequest(BaseModel):
-    date: str | None = Field(None, description="日期 YYYY-MM-DD,为空则采集当天")
-
-
-class IngestSimpleResponse(BaseModel):
-    count: int = 0
-    updated: int = 0
-    skipped: int = 0
-    unmatched: int = 0
-    errors: list[str] = []
-
-
 class SettleRequest(BaseModel):
     prediction_id: int
     home_goals: int = Field(ge=0, le=30)