fix: prevent intent token reuse and add expiry

(cherry picked from commit b1e60e7398)

internal/static/i18n/en.yaml

@@ -538,6 +538,7 @@ Errors:
     StateMissing: State parameter is missing in the request
     NotStarted: Intent is not started or was already terminated
     NotSucceeded: Intent has not succeeded
+    Expired: Intent has expired
     TokenCreationFailed: Token creation failed
     InvalidToken: Intent Token is invalid
     OtherUser: Intent meant for another user