chore: default reserved-capacity feature (#2391)

Author: ctian1

crates/sdk/Cargo.toml

@@ -61,7 +61,7 @@ test-artifacts = { path = "../test-artifacts" }
 tokio-test = { version = "0.4" }
 
 [features]
-default = ["network"]
+default = ["network", "reserved-capacity"]
 native-gnark = ["sp1-prover/native-gnark"]
 # TODO: Once alloy has a 1.* release, we can likely remove this feature flag, as there will be less 
 # dependency resolution issues.