refactor: unify channel config matching and gating

Co-authored-by: thewilloftheshadow <thewilloftheshadow@users.noreply.github.com>

extensions/msteams/src/policy.test.ts

@@ -31,6 +31,8 @@ describe("msteams policy", () => {
       expect(res.channelConfig?.requireMention).toBe(true);
       expect(res.allowlistConfigured).toBe(true);
       expect(res.allowed).toBe(true);
+      expect(res.channelMatchKey).toBe("chan456");
+      expect(res.channelMatchSource).toBe("direct");
     });
 
     it("returns undefined configs when teamId is missing", () => {

extensions/msteams/src/policy.ts

@@ -13,6 +13,8 @@ export type MSTeamsResolvedRouteConfig = {
   allowed: boolean;
   teamKey?: string;
   channelKey?: string;
+  channelMatchKey?: string;
+  channelMatchSource?: "direct" | "wildcard";
 };
 
 export function resolveMSTeamsRouteConfig(params: {
@@ -75,6 +77,8 @@ export function resolveMSTeamsRouteConfig(params: {
     allowed,
     teamKey,
     channelKey,
+    channelMatchKey: channelKey,
+    channelMatchSource: channelKey ? (channelKey === "*" ? "wildcard" : "direct") : undefined,
   };
 }