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>>

frontend/src/pages/Matches.tsx

@@ -2,6 +2,7 @@ import { useCallback, useEffect, useRef, useState } from 'react'
 import TeamSideTag from '../components/TeamSideTag'
 import { fetchMatchDetail, fetchMatchContext } from '../admin/dal'
 import type { MatchDetailOut, MatchContextOut, MatchRecentPrediction, TeamRecentMatch } from '../admin/types'
+import type { MatchStatsDetail } from '../admin/types'
 
 interface Match {
   id: number
@@ -63,7 +64,7 @@ const AGENT_LABELS: Record<string, string> = {
   form: '近期状态分析专家',
   stats: '攻防数据分析专家',
   home_away: '主客因素分析专家',
-  injuries: '阵容完整性分析专家',
+  standings: '联赛排名分析专家',
 }
 
 const LEAGUES = [
@@ -679,7 +680,7 @@ function PredictProgress() {
   const AGENT_START = 4
   const AGENT_STEP = 8        // 每路专家约 8s 点亮一路
   const AGG_START = AGENT_START + AGENT_STEP * 5
-  const agents = ['form', 'stats', 'home_away', 'injuries', 'h2h']
+  const agents = ['form', 'stats', 'home_away', 'standings', 'h2h']
 
   const phase = elapsed < SLICE_END ? 'slice'
     : elapsed < AGG_START ? 'agents' : 'agg'
@@ -1114,6 +1115,11 @@ function MatchDetailPanel({
             )}
           </div>
 
+          {/* 比赛详细统计(bzzoiro /events/{id}/stats/) */}
+          {detail?.stats && (
+            <MatchStatsPanel stats={detail.stats} homeName={homeName} awayName={awayName} />
+          )}
+
           {/* 双方近况 + H2H */}
           {(ctx?.home_recent?.length || ctx?.away_recent?.length || ctx?.h2h?.length) ? (
             <div className="grid gap-4 sm:grid-cols-3">
@@ -1144,6 +1150,80 @@ function MatchDetailPanel({
   )
 }
 
+/** 比赛详细统计面板(bzzoiro /events/{id}/stats/) */
+function MatchStatsPanel({
+  stats, homeName, awayName,
+}: { stats: MatchStatsDetail; homeName: string; awayName: string }) {
+  const rows: Array<{ label: string; home: number | null; away: number | null; highlight?: 'high' | 'low' }> = [
+    { label: '预期进球(xG)', home: stats.home_xg, away: stats.away_xg },
+    { label: '射门', home: stats.home_shots, away: stats.away_shots },
+    { label: '射正', home: stats.home_shots_on_target, away: stats.away_shots_on_target },
+    { label: '角球', home: stats.home_corners, away: stats.away_corners },
+    { label: '犯规', home: stats.home_fouls, away: stats.away_fouls },
+    { label: '绝佳机会', home: stats.home_big_chances, away: stats.away_big_chances },
+    { label: '黄牌', home: stats.home_yellow_cards, away: stats.away_yellow_cards },
+    { label: '红牌', home: stats.home_red_cards, away: stats.away_red_cards },
+  ]
+  const hasAny = rows.some(r => r.home != null || r.away != null)
+  if (!hasAny) return null
+
+  // 控球率用横条展示
+  const possHome = stats.home_possession
+  const possAway = possHome != null ? Math.max(0, 100 - possHome) : null
+
+  return (
+    <div>
+      <h4 className="section-head mb-2">比赛统计</h4>
+
+      {/* 控球率横条 */}
+      {possHome != null && possAway != null && (
+        <div className="mb-3">
+          <div className="mb-1 flex justify-between text-2xs text-ink-500">
+            <span>{possHome.toFixed(0)}%</span>
+            <span className="text-ink-400">控球率</span>
+            <span>{possAway.toFixed(0)}%</span>
+          </div>
+          <div className="flex h-1.5 overflow-hidden rounded-full bg-ink-200">
+            <div className="bg-ink-700 transition-[width] duration-500" style={{ width: `${possHome}%` }} />
+            <div className="bg-ink-300 transition-[width] duration-500" style={{ width: `${possAway}%` }} />
+          </div>
+        </div>
+      )}
+
+      {/* 主客对比表 */}
+      <div className="overflow-x-auto">
+        <table className="w-full text-xs">
+          <thead>
+            <tr className="border-b border-ink-200 text-ink-400">
+              <th className="py-1.5 text-left font-medium">{homeName}</th>
+              <th className="py-1.5 text-center font-medium text-ink-500">统计项</th>
+              <th className="py-1.5 text-right font-medium">{awayName}</th>
+            </tr>
+          </thead>
+          <tbody>
+            {rows.filter(r => r.home != null || r.away != null).map(r => {
+              const h = r.home ?? 0
+              const a = r.away ?? 0
+              const winner = h > a ? 'home' : h < a ? 'away' : 'tie'
+              return (
+                <tr key={r.label} className="border-b border-ink-100">
+                  <td className={`py-1.5 text-right tabular-nums ${winner === 'home' ? 'font-bold text-ink-900' : 'text-ink-500'}`}>
+                    {r.home ?? '—'}
+                  </td>
+                  <td className="py-1.5 text-center text-ink-500">{r.label}</td>
+                  <td className={`py-1.5 text-left tabular-nums ${winner === 'away' ? 'font-bold text-ink-900' : 'text-ink-500'}`}>
+                    {r.away ?? '—'}
+                  </td>
+                </tr>
+              )
+            })}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  )
+}
+
 /** 近况/H2H 单区块 */
 function RecentBlock({ title, rows, side }: { title: string; rows?: TeamRecentMatch[]; side: 'home' | 'away' | 'h2h' }) {
   return (