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_trace.py

@@ -48,7 +48,25 @@ class TestPoolCandidateTraceExtraData:
         ct = PoolCandidateTrace(key_id="k4", reason="random")
         data = ct.to_extra_data()
         sel = data["pool_selection"]
-        assert sel == {"reason": "random"}
+        assert sel["reason"] == "random"
+        assert sel["scoring_mode"] == "lru"
+
+    def test_selected_multi_score_fields(self) -> None:
+        ct = PoolCandidateTrace(
+            key_id="k4b",
+            reason="multi_score",
+            scoring_mode="multi_score",
+            latency_avg_ms=245.7,
+            health_score=0.82,
+            composite_score=0.372156,
+        )
+        data = ct.to_extra_data()
+        sel = data["pool_selection"]
+        assert sel["reason"] == "multi_score"
+        assert sel["scoring_mode"] == "multi_score"
+        assert sel["latency_avg_ms"] == 245.7
+        assert sel["health_score"] == 0.82
+        assert sel["composite_score"] == 0.372156
 
     def test_skipped_cooldown(self) -> None:
         ct = PoolCandidateTrace(
@@ -78,11 +96,28 @@ class TestPoolCandidateTraceExtraData:
         assert skip["cost_window_usage"] == 2000
         assert "cooldown_reason" not in skip
 
+    def test_skipped_account_blocked(self) -> None:
+        ct = PoolCandidateTrace(
+            key_id="k6b",
+            skipped=True,
+            skip_type="account_blocked",
+            account_block_code="account_banned",
+            account_block_label="账号封禁",
+            account_block_reason="account suspended",
+        )
+        data = ct.to_extra_data()
+        skip = data["pool_skip"]
+        assert skip["type"] == "account_blocked"
+        assert skip["account_block_code"] == "account_banned"
+        assert skip["account_block_label"] == "账号封禁"
+        assert skip["account_block_reason"] == "account suspended"
+
     def test_skipped_minimal(self) -> None:
         ct = PoolCandidateTrace(key_id="k7", skipped=True, skip_type="upstream")
         data = ct.to_extra_data()
         skip = data["pool_skip"]
-        assert skip == {"type": "upstream"}
+        assert skip["type"] == "upstream"
+        assert skip["scoring_mode"] == "lru"
 
 
 # ---------------------------------------------------------------------------
@@ -113,6 +148,7 @@ class TestPoolSchedulingTraceSummary:
         assert summary["attempted"] == 2
         assert summary["skipped_cooldown"] == 2
         assert summary["skipped_cost"] == 1
+        assert summary["skipped_account_blocked"] == 0
         assert summary["sticky_session"] is True
         assert summary["success_key_id"] == "k1"[:8]
         assert summary["success_reason"] == "sticky"
@@ -129,6 +165,7 @@ class TestPoolSchedulingTraceSummary:
         assert summary["attempted"] == 2
         assert summary["skipped_cooldown"] == 0
         assert summary["skipped_cost"] == 0
+        assert summary["skipped_account_blocked"] == 0
         assert "success_key_id" not in summary
         assert "success_reason" not in summary
 
@@ -143,3 +180,15 @@ class TestPoolSchedulingTraceSummary:
         assert summary["attempted"] == 0
         assert summary["skipped_cooldown"] == 1
         assert summary["skipped_cost"] == 1
+        assert summary["skipped_account_blocked"] == 0
+
+    def test_summary_with_account_blocked(self) -> None:
+        trace = PoolSchedulingTrace(provider_id="prov-4", total_keys=2)
+        trace.candidate_traces = {
+            "k1": PoolCandidateTrace(key_id="k1", skipped=True, skip_type="account_blocked"),
+            "k2": PoolCandidateTrace(key_id="k2", reason="lru"),
+        }
+
+        summary = trace.build_summary(success_key_id="k2")
+        assert summary["attempted"] == 1
+        assert summary["skipped_account_blocked"] == 1