Automatically retry when API is Overloaded or 500s

crates/agent/Cargo.toml

@@ -72,6 +72,7 @@ gpui = { workspace = true, "features" = ["test-support"] }
 indoc.workspace = true
 language = { workspace = true, "features" = ["test-support"] }
 language_model = { workspace = true, "features" = ["test-support"] }
+parking_lot.workspace = true
 pretty_assertions.workspace = true
 project = { workspace = true, features = ["test-support"] }
 workspace = { workspace = true, features = ["test-support"] }