Fix: Reown permissions syntax

[tuliomir]

Description

Newly installed RPC Handler environments were failing to request permissions to the wallet clients, with a warning message on console informing that "requiredNamespaces are deprecated and are automatically assigned to optionalNamespaces".

This was tracked down to a change on Wallet Connect Core v2.21.0, driven by a convention from 2023. Our current staging RPC Handler uses v2.15.0, so it still has the older syntax, but any newly installed RPC server will fail to connect to the Desktop Wallet.

Acceptance Criteria

• Adapts to a breaking change on the @walletconnect/core that makes the requiredNamespaces property obsolete

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.