The 929-line interop registry split three ways: host-static.ss keeps the
registries, the jhost record, the emit entry points and coercion helpers;
host-static-statics.ss holds the java.lang/util static-method registrations;
host-static-objects.ss holds the host object classes (ArrayList, HashMap, the
reader/writer/tokenizer shims, ctors, URL codecs) and the instance? hook. rt.ss
loads the three in order. Runtime shim — no seed change.
