feat(pool): 引入多维评分调度策略与账号状态检测

- 新增 multi_score 调度模式，支持 LRU/延迟/健康度/剩余额度多维加权评分
- 新增调度预设维度系统（free_team_first, quota_balanced, recent_refresh, single_account），支持有序对象列表配置格式并兼容旧字符串列表
- 新增 account_state 模块，统一账号封禁/受限检测逻辑，替代分散在 routes 中的判断代码
- 新增 health_cache 模块和 latency 采样（redis_ops.record_latency / batch_get_latency_avgs）
- RequestDispatcher 返回 ttfb_ms，PoolManager.on_request_success 记录延迟样本
- 前端：PoolConfigDialog 替换为 PoolSchedulingDialog，支持预设维度可视化配置；号池管理页增加调度模式标签与账号异常 Badge 显示
- 提取前端 accountBlock 工具函数，ProviderDetailDrawer 复用统一判断
- scheduling_dimensions 增加 account_state 和 latency 维度评估
- 补充 account_state、health_cache、multi_score 策略、preset 维度、redis latency 等测试

tests/services/test_pool_health_cache.py

@@ -0,0 +1,58 @@
+"""Tests for pool health cache helpers."""
+
+from __future__ import annotations
+
+from types import SimpleNamespace
+
+from src.services.provider.pool import health_cache
+
+
+def setup_function() -> None:
+    health_cache._clear_cache_for_tests()
+
+
+def teardown_function() -> None:
+    health_cache._clear_cache_for_tests()
+
+
+def test_aggregate_health_score_uses_lowest_format_score() -> None:
+    score = health_cache.aggregate_health_score(
+        {
+            "openai:chat": {"health_score": 0.92},
+            "openai:responses": {"health_score": 0.61},
+        }
+    )
+    assert score == 0.61
+
+
+def test_get_health_scores_uses_cache_for_same_provider() -> None:
+    key = SimpleNamespace(id="k1", health_by_format={"f1": {"health_score": 0.7}})
+    first = health_cache.get_health_scores("p1", [key])
+    assert first["k1"] == 0.7
+
+    key.health_by_format = {"f1": {"health_score": 0.2}}
+    second = health_cache.get_health_scores("p1", [key])
+    assert second["k1"] == 0.7
+
+
+def test_get_health_scores_merges_missing_keys_into_cache() -> None:
+    k1 = SimpleNamespace(id="k1", health_by_format={"f1": {"health_score": 0.7}})
+    first = health_cache.get_health_scores("p1", [k1])
+    assert first == {"k1": 0.7}
+
+    # Request with a new key k2 -- k1 should come from cache, k2 freshly computed
+    k1_stale = SimpleNamespace(id="k1", health_by_format={"f1": {"health_score": 0.1}})
+    k2 = SimpleNamespace(id="k2", health_by_format={"f1": {"health_score": 0.5}})
+    second = health_cache.get_health_scores("p1", [k1_stale, k2])
+    assert second["k1"] == 0.7  # cached, not recomputed
+    assert second["k2"] == 0.5  # freshly computed
+
+
+def test_invalidate_provider_health_scores_clears_cache_entry() -> None:
+    key = SimpleNamespace(id="k1", health_by_format={"f1": {"health_score": 0.8}})
+    _ = health_cache.get_health_scores("p1", [key])
+    health_cache.invalidate_provider_health_scores("p1")
+
+    key.health_by_format = {"f1": {"health_score": 0.3}}
+    refreshed = health_cache.get_health_scores("p1", [key])
+    assert refreshed["k1"] == 0.3