graph: Fix ArweaveClient to disable gzip compression

When reqwest gzip feature is enabled globally, Client::default() enables
automatic gzip compression which removes content-length headers from responses.
ArweaveClient needs content-length to check file sizes, so explicitly disable
gzip for Arweave requests.

Fixes test: polling_monitor::ipfs_service::test::arweave_get

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: 2 people

graph/src/components/link_resolver/arweave.rs

@@ -42,7 +42,7 @@ impl Default for ArweaveClient {
 
         Self {
             base_url: "https://arweave.net".parse().unwrap(),
-            client: Client::default(),
+            client: Client::builder().gzip(false).build().unwrap(),
             logger: Logger::root(slog::Discard, o!()),
         }
     }
@@ -53,7 +53,7 @@ impl ArweaveClient {
         Self {
             base_url,
             logger,
-            client: Client::default(),
+            client: Client::builder().gzip(false).build().unwrap(),
         }
     }
 }