allow extensions on end of urls

src/index.ts

···
     }
 
     const url = new URL(request.url);
-    const [handle, base62OrCid] = url.pathname.split('/').filter(Boolean);
+    let [handle, base62OrCid] = url.pathname.split('/').filter(Boolean);
 
     if (!handle || !base62OrCid) {
       return new Response('Invalid path. Expected: /{handle}/{cid}', { status: 400 });
···
           ? `did:${cachedDid}`
           : `did:plc:${cachedDid}`;
       }
+    }
+
+    // ignore extensions on CID during lookup
+    const match = base62OrCid.match(/^([^.@]+)/);
+    if (match) {
+      base62OrCid = match[1];
     }
 
     // CID handling - expect bafkrei* format