Feature/default messenger delivery target (openclaw#16985) thanks @KirillShchetinin

Verified:
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: KirillShchetinin <13061871+KirillShchetinin@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/config/types.msteams.ts

@@ -63,6 +63,8 @@ export type MSTeamsConfig = {
   dmPolicy?: DmPolicy;
   /** Allowlist for DM senders (AAD object IDs or UPNs). */
   allowFrom?: Array<string>;
+  /** Default delivery target for CLI --deliver when no explicit --reply-to is provided. */
+  defaultTo?: string;
   /** Optional allowlist for group/channel senders (AAD object IDs or UPNs). */
   groupAllowFrom?: Array<string>;
   /**