fix(lint): Add ctx shim to routes/auth/totp

- Add credentialManager, totpConfig, saveTotpConfig, session to deps
- Create ctx shim for backward compatibility
- Fix hasOwnProperty anti-pattern (use Object.prototype.hasOwnProperty.call)

Result: 54 errors → 0 errors

dashcaddy-api/routes/auth/index.js

@@ -18,6 +18,7 @@ module.exports = function(ctx) {
     authManager: ctx.authManager,
     credentialManager: ctx.credentialManager,
     totpConfig: ctx.totpConfig,
+    saveTotpConfig: ctx.saveTotpConfig,
     session: ctx.session,
     asyncHandler: ctx.asyncHandler,
     errorResponse: ctx.errorResponse,