fix: consolidate KeyMeta interface and improve type safety

- Remove duplicate KeyMeta interface from crypto/vc/index.ts
- Import KeyMeta from common.ts as single source of truth
- Add missing fields to KeyMeta interface (identity, passkeyCredIdHex)
- Remove unused ErrorResponse interface from endorserServer.ts
- Fix import path for KeyMeta in crypto/vc/index.ts

This change resolves type compatibility issues and ensures consistent
KeyMeta type usage across the codebase.

src/libs/endorserServer.ts

@@ -147,14 +147,6 @@ export function isEmptyOrHiddenDid(did?: string): boolean {
   return !did || did === HIDDEN_DID;
 }
 
-// Add these interfaces at the top of the file
-interface ErrorResponse {
-  error?: string;
-  message?: string;
-  status?: number;
-  [key: string]: unknown;
-}
-
 /**
  * Recursively tests strings within an object/array against a test function
  * @param {Function} func - Test function to apply to strings