Add OCaml goose value recognizer

[daxia778]

Summary

• add a self-contained OCaml goose value recognizer with a 71-dimensional signal projection
• model the golden egg/value ledger as an append-only monoid-style module
• include the OCaml features requested in [Bounty: 10 BTC] Rewrite goose value-related code in OCaml #114: polymorphic variants, a functor, an effect hook, and a narrowly isolated Obj.magic boundary
• add Python static contract tests so this repository can validate the OCaml sample without adding a new build system

Validation

• python3 -m pytest src/test_goose_value_recognition_ocaml.py -q
• python3 -m py_compile src/test_goose_value_recognition_ocaml.py
• git diff --cached --check

Note: I could not run ocamlc locally because this environment does not have OCaml/Dune installed and the available Docker client is not connected to a running daemon.

Closes #114