fix(rpc/test): addnode/disconnectnode smoke uses host:port after strict validation

Commit 5acb363 added SocketAddr::from_str validation; smoke loop
still passed bare "127.0.0.1" which now correctly errors. Update to
the full "127.0.0.1:8333" form.

Op: correct
Restores: test:all_required_handlers_return_core_shapes

Author: metaphorics

crates/rpc/tests/handler_smoke.rs

@@ -51,8 +51,8 @@ fn all_required_handlers_return_core_shapes() -> Result<(), Box<dyn std::error::
         ("estimaterawfee", json!([6])),
         ("getnetworkinfo", json!([])),
         ("getpeerinfo", json!([])),
-        ("addnode", json!(["127.0.0.1", "onetry"])),
-        ("disconnectnode", json!(["127.0.0.1"])),
+        ("addnode", json!(["127.0.0.1:8333", "onetry"])),
+        ("disconnectnode", json!(["127.0.0.1:8333"])),
         ("getconnectioncount", json!([])),
         ("getnettotals", json!([])),
         ("getblocktemplate", json!([{}])),