[feat] update credentials

[d4mr]

PR-Codex overview

This PR focuses on enhancing the wallet credential management system by adding nullable properties, improving error handling, and introducing an update route for wallet credentials.

Detailed summary

• isDefault and deletedAt properties made nullable.
• Improved entitySecret validation description in create.ts.
• Added updateWalletCredentialRoute to handle updates for wallet credentials.
• Enhanced error handling in create.ts and update.ts.
• Introduced update-wallet-credential.ts for updating wallet credentials logic.

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