Refine representation format defaulting for UUID, BigDecimal, and BigInteger #5037
Description
With the changes #4920/#4957 and #3932/#5034, we switched default representations for UUID, BigDecimal, and BigInteger values. Switching a default is a subtle change that isn't immediately visible (in contrast to a clearly behavioral or breaking API change) but can remain invisible until a late deployment or operational stage.
A way out would be removing defaulting and requiring a choice expressed by application configuration. It would help to fail early if e.g. the domain model uses UUID's or BigDecimals in implicit field target mode and an associated configuration property isn't set to indicate we require a user choice.
Another alternative could be leaving defaults as-is but issuing warn logging if the default value is implicitly (i.e. not explicitly configured) used.