Optimize Initial Data Fetching and Add Missing Credential Issuer Metadata Retrieval

[gkatrakazas]

Summary

This PR optimizes the data fetching strategy during the initial load by removing redundant calls to fetch VC and VP, which are already adequately handled on the home page upon login or signup. Additionally, it introduces the fetching of missing credential issuer metadata, ensuring comprehensive data availability and integrity from the start.

Changes

• Removal of Redundant Data Fetching: The calls to get('/storage/vc') and get('/storage/vp') have been removed from the fetchInitialData function as these are already being called on the home page (/). This change eliminates unnecessary network requests during the initial data loading phase, thereby improving the loading performance and reducing data redundancy.
• Addition of Credential Issuer Metadata Retrieval: Implemented a new feature in the fetchInitialData function to fetch credential issuer metadata for each issuer obtained from getExternalEntity('/issuer/all'). This ensures that all relevant metadata about issuers is readily available, filling a previously existing gap in our data fetching logic.