Log proxy errors (#519)

## Description

<!-- Provide a brief description of the changes in this PR -->

Add logging to proxy endpoint to see where error occurs when fetching
ipfs urls on vercel backend

## Type of change

<!-- Check the appropriate options that apply to this PR -->

-   [ ] Bug fix
-   [ ] New feature
-   [ ] Protocol integration
-   [ ] Documentation update
-   [x] Other (please describe): logging for bug fix

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----

> [!IMPORTANT]
> Add logging to proxy endpoint in `route.ts` to diagnose errors when
fetching IPFS URLs, and fix indentation in `ip.ts`.
> 
>   - **Logging**:
> - Add `console.error` for unsupported protocol and private IP
detection in `GET()` in `route.ts`.
>     - Log general errors in `GET()` in `route.ts`.
>   - **Formatting**:
>     - Fix indentation in `checkURLForPrivateIP()` in `ip.ts`.
> 
> <sup>This description was created by </sup>[<img alt="Ellipsis"
src="https://img.shields.io/badge/Ellipsis-blue?color=175173">](https://www.ellipsis.dev?ref=solana-foundation%2Fexplorer&utm_source=github&utm_medium=referral)<sup>
for d54cb45. It will automatically
update as commits are pushed.</sup>

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Author: ngundotra

app/api/metadata/proxy/feature/ip.ts

@@ -90,7 +90,7 @@ export async function checkURLForPrivateIP(uri: URL | string) {
             for (const address of addresses) {
                 if (isPrivateIP(address.address)) {
                     return true;
-              }
+                }
             }
         } else {
             const singleResult = addresses as unknown as LookupAddressResult;

app/api/metadata/proxy/route.ts

@@ -18,7 +18,7 @@ const TIMEOUT = process.env.NEXT_PUBLIC_METADATA_TIMEOUT
 /**
  *  Respond with error in a JSON format
  */
-function respondWithError(status: keyof typeof errors, message?: string){
+function respondWithError(status: keyof typeof errors, message?: string) {
     return NextResponse.json({ error: message ?? errors[status].message }, { status });
 }
 
@@ -47,14 +47,17 @@ export async function GET(
 
         // check that uri has supported protocol despite of any other checks
         if (!isHTTPProtocol(parsedUrl)) {
+            console.error('Unsupported protocol', parsedUrl.protocol);
             return respondWithError(400);
         }
 
         const isPrivate = await checkURLForPrivateIP(parsedUrl);
         if (isPrivate) {
+            console.error('Private IP detected', parsedUrl.hostname);
             return respondWithError(403);
         }
     } catch (_error) {
+        console.error(_error);
         return respondWithError(400);
     }