Upgrade rust to 2026-06-28 (#53783)

GitOrigin-RevId: 76a1295e828e0681cb40c7016da032d96e9df62e

Author: goffrie

Cargo.toml

@@ -34,6 +34,7 @@ tracing-subscriber = { features = [ "env-filter" ], version = "0.3.17" }
 
 [lints.rust]
 unused_extern_crates = "warn"
+unused_features = "allow"
 
 [lints.clippy]
 await_holding_lock = "warn"
@@ -51,3 +52,5 @@ type_complexity = "allow"
 upper_case_acronyms = "allow"
 useless_format = "allow"
 useless_vec = "allow"
+collapsible_match = "allow"
+chunks_exact_to_as_chunks = "allow"

rust-toolchain

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "nightly-2026-02-18"
+channel = "nightly-2026-06-28"

src/client/mod.rs

@@ -155,9 +155,7 @@ impl PyConvexClient {
                 client: instance,
             }),
             Err(e) => Err(PyException::new_err(format!(
-                "{}: {}",
-                "Failed to create PyConvexClient",
-                &e.to_string()
+                "Failed to create PyConvexClient: {e}",
             ))),
         }
     }