Sub2API v1.0 - AI API 网关（二开初始版本，基于上游 Wei-Shaw/sub2api）

backend/migrations/198_channel_monitor_v2_health_thresholds.sql

@@ -0,0 +1,33 @@
+-- Configurable Channel Monitor V2 health scoring thresholds.
+-- Defaults are intentionally tolerant: small amounts of real traffic errors or
+-- zero cache rate should not immediately paint the user page as "abnormal".
+ALTER TABLE channel_monitor_v2_config
+    ADD COLUMN IF NOT EXISTS health_thresholds JSONB NOT NULL DEFAULT '{
+      "minimum_sample": 50,
+      "warning_error_rate": 0.05,
+      "critical_error_rate": 0.20,
+      "target_ttft_ms": 3000,
+      "warning_ttft_ms": 8000,
+      "critical_ttft_ms": 20000,
+      "warning_cache_rate": 0,
+      "critical_cache_rate": 0,
+      "error_weight": 0.60,
+      "ttft_weight": 0.20,
+      "cache_weight": 0.20
+    }'::jsonb;
+
+UPDATE channel_monitor_v2_config
+SET health_thresholds = '{
+      "minimum_sample": 50,
+      "warning_error_rate": 0.05,
+      "critical_error_rate": 0.20,
+      "target_ttft_ms": 3000,
+      "warning_ttft_ms": 8000,
+      "critical_ttft_ms": 20000,
+      "warning_cache_rate": 0,
+      "critical_cache_rate": 0,
+      "error_weight": 0.60,
+      "ttft_weight": 0.20,
+      "cache_weight": 0.20
+    }'::jsonb || health_thresholds
+WHERE id = 1;