refactor: fixed issue in index.ts as well as adding const cast to codec def

TICKET: WP-5446

Author: danielzhao122

modules/express/src/typedRoutes/api/index.ts

@@ -48,6 +48,7 @@ export const ExpressApi = apiSpec({
   },
   'express.lightning.unlockWallet': {
     post: PostUnlockLightningWallet,
+  },
   'express.verifycoinaddress': {
     post: PostVerifyCoinAddress,
   },

modules/express/src/typedRoutes/api/v2/unlockWallet.ts

@@ -10,15 +10,15 @@ import { BitgoExpressError } from '../../schemas/error';
 export const UnlockLightningWalletParams = {
   coin: t.string,
   id: t.string,
-};
+} as const;
 
 /**
  * Request body for unlocking a lightning wallet
  * @property {string} passphrase - Passphrase to unlock the lightning wallet.
  */
 export const UnlockLightningWalletBody = {
   passphrase: t.string,
-};
+} as const;
 
 /**
  * Lightning - Unlock node