The solana web3 connection with Xandeum-compatible JSON-RPC endpoint (e.g., 'https://api.devnet.solana.com').
The filesystem path to query metadata for (e.g., /documents/myfile.txt).
A Promise<any> resolving to the parsed JSON response from the RPC server,
typically containing a result object with metadata fields.
Sends a JSON-RPC request to the Xandeum RPC endpoint to retrieve metadata about a file or directory at the given path.
This function calls the custom RPC method
getMetadata, which is implemented by the backend to return metadata such as type (file or directory), size, timestamps etc.