Brummel
1a5f8289b7
Iter mq.1 plan: move InstanceDef.class / Constraint.class / SuperclassRef.class from bare-only to canonical form per ct.1's existing rule, extend validate_canonical_type_names with three new field walks, narrow check_class_name_fields to ClassDef.name-only, qualify build_registry's class_def_module + class_by_name + entries + four lookup sites, qualify ClassMethodEntry.class_name + class_superclasses, update affected test-assertion strings. Pre-flight recon flagged that the spec's '14 fixtures migrated' cost claim is over-stated: all existing fixture class refs are intra-module under the canonical-form rule. Plan does not add migration work that does not need doing; Task 7 Step 3 verifies zero existing-fixture diff.