fix(core): linearize session publication

core/tests/abi_contract.rs

@@ -742,6 +742,7 @@ fn signer_callback_rejects_every_stateful_api_across_handles() {
     let other = create(&mut other_ctx);
 
     let mut ctx = Context::default();
+    ctx.reentry_cancel.store(OK, Ordering::SeqCst);
     ctx.reentry_target.store(other as usize, Ordering::SeqCst);
     let mut cfg = config(&mut ctx);
     cfg.sign_admission = Some(sign_admission_probes_global_reentry);