fix(telegram): namespace slash SessionKey by agent

Fixes openclaw/openclaw#38648

src/telegram/bot-native-commands.session-meta.test.ts

@@ -198,7 +198,7 @@ describe("registerTelegramNativeCommands — session metadata", () => {
     )[0]?.[0];
     expect(call?.ctx?.OriginatingChannel).toBe("telegram");
     expect(call?.ctx?.Provider).toBe("telegram");
-    expect(call?.sessionKey).toBeDefined();
+    expect(call?.sessionKey).toBe("agent:main:telegram:slash:200");
   });
 
   it("awaits session metadata persistence before dispatch", async () => {

src/telegram/bot-native-commands.ts

@@ -669,7 +669,7 @@ export const registerTelegramNativeCommands = ({
             WasMentioned: true,
             CommandAuthorized: commandAuthorized,
             CommandSource: "native" as const,
-            SessionKey: `telegram:slash:${senderId || chatId}`,
+            SessionKey: `agent:${route.agentId}:telegram:slash:${senderId || chatId}`,
             AccountId: route.accountId,
             CommandTargetSessionKey: sessionKey,
             MessageThreadId: threadSpec.id,