GeezerVison

Summary

• reject unresolved string references in effective POST/PUT objects with UnsupportedOperationException
• keep existing GET, DELETE, and resolved-reference behavior
• add DB-free regression coverage, including CRUD → @post dispatch

This prevents an out-of-order write reference from silently skipping the write while the parser returns success.

Validation

• mvn -Dtest=AbstractObjectParserReferenceTest test — 8 passed
• mvn clean verify — 36 passed

The core APIJSONORM path was tested; the APIJSON-Demo /register endpoint was not retested.

Fixes #275