## What
Factorizes the two responsibilities that were copy‑pasted across every
`from-<entity>-entity-to-flat-<entity>` util into two reusable tools.
### `fromEntityToScalarEntity`
Projects a TypeORM entity into its scalar flat shape using an
**allow‑list** driven by
`ALL_ENTITY_PROPERTIES_CONFIGURATION_BY_METADATA_NAME` (plus the base
columns `id`/`workspaceId`/`applicationId`/`universalIdentifier`). Only
registered scalar columns are forwarded, `Date`s are serialized to ISO
strings, and absent values are normalized to `null`. Replaces the
previous deny‑list (`removePropertiesFromRecord`) approach, so
unregistered/deprecated columns can no longer silently leak into the
flat entity.
### `resolveManyToOneRelationIdsToUniversalIdentifiers`
Resolves an entity's many‑to‑one foreign keys to their universal
identifiers, driven by `ALL_MANY_TO_ONE_METADATA_RELATIONS`. Handles the
always‑present `application`, nullable relations, and throws a
`FlatEntityMapsException` when a referenced id is missing from its
identifier map. Mirrors `resolveUniversalRelationIdentifiersToIds` in
the opposite direction.
Each `from-<entity>` util now reduces to: scalar spread + relation
spread (+ explicit one‑to‑many id/universalIdentifier arrays where
applicable).
### Note
The allow‑list drops `isUIReadOnly` (a `WasRemovedInUpgrade` column not
in the config) from `fieldMetadata`, which is the only
integration‑snapshot change.
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Paul Rastoin
d2387430a1
