WIP checkpoint schema8 analysis core before user reboot

crates/oa-core/src/validation.rs

@@ -180,6 +180,18 @@ fn check_ids(out: &mut Vec<Issue>, owner: Id, field: &str, ids: &[Id]) {
 }
 
 pub fn validate(p: &Project) -> Vec<Issue> {
+    // Bound analysis trees before architectural visitors can clone an element.
+    // Admission itself never enters this public validator recursively.
+    if let Err(failure) = crate::analysis::admit_structure_checked(p, crate::analysis::AdmissionLimits::REFERENCE) {
+        let mut out = Vec::new();
+        error(&mut out, failure.object, &failure.code, &failure.field, failure.message);
+        return out;
+    }
+    validate_structure(p)
+}
+
+/// Architecture/header validation without recursively re-entering analysis admission.
+pub(crate) fn validate_structure(p: &Project) -> Vec<Issue> {
     let mut out = Vec::new();
     let coverage = coverage::Index::new(p);
     let topology_index = crate::topology_context::TopologyIndex::new(p);