feat(v2): add durable run observability

Author: Michael Eichelbeck

zeroshot-rust/src/lib.rs

@@ -17,6 +17,7 @@ pub mod native_v2_admission;
 pub mod native_v2_claude;
 pub mod native_v2_codex;
 pub mod native_v2_contract;
+pub mod native_v2_observability;
 pub mod native_v2_runner;
 pub mod native_v2_supervisor;
 pub mod product_errors;