feat: channel affinity (#2669)

* feat: channel affinity

* feat: channel affinity -> model setting

* fix: channel affinity

* feat: channel affinity op

* feat: channel_type setting

* feat: clean

* feat: cache supports both memory and Redis.

* feat: Optimise ui/ux

* feat: Optimise ui/ux

* feat: Optimise codex usage ui/ux

* feat: Optimise ui/ux

* feat: Optimise ui/ux

* feat: Optimise ui/ux

* feat: If the affinitized channel fails and a retry succeeds on another channel, update the affinity to the successful channel

web/src/pages/Setting/Model/SettingGlobalModel.jsx

@@ -49,6 +49,7 @@ const chatCompletionsToResponsesPolicyExample = JSON.stringify(
     enabled: true,
     all_channels: false,
     channel_ids: [1, 2],
+    channel_types: [1],
     model_patterns: ['^gpt-4o.*$', '^gpt-5.*$'],
   },
   null,