refactor: drop legacy session store keys

src/config/types.base.ts

@@ -1,3 +1,5 @@
+import type { NormalizedChatType } from "../channels/chat-type.js";
+
 export type ReplyMode = "text" | "command";
 export type TypingMode = "never" | "instant" | "thinking" | "message";
 export type SessionScope = "per-sender" | "global";
@@ -41,7 +43,7 @@ export type HumanDelayConfig = {
 export type SessionSendPolicyAction = "allow" | "deny";
 export type SessionSendPolicyMatch = {
   channel?: string;
-  chatType?: "direct" | "group" | "channel";
+  chatType?: NormalizedChatType;
   keyPrefix?: string;
 };
 export type SessionSendPolicyRule = {