fix(engine): add missing tracing dependency to reth-engine-primitives

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: chee-chyuan

crates/engine/primitives/Cargo.toml

@@ -36,6 +36,7 @@ futures = { workspace = true, optional = true }
 auto_impl.workspace = true
 serde.workspace = true
 thiserror.workspace = true
+tracing.workspace = true
 
 [features]
 default = ["std"]