feat: validate referenced entry content types in entries audit

[cs-raj]

feat(audit): Validate reference content types against schema in entries audit

Problem

The entries audit only verified that referenced entry UIDs exist in the export. It did not validate that the referenced entry's content type matched the schema's reference_to. This allowed invalid references to pass audit, e.g.:

• Reference fields: A field with reference_to: ["ct1"] could reference ct2 entries and pass
• JSON RTE: A field with reference_to: ["ct1", "sys_assets"] could embed ct2 entries and pass

These invalid references could cause import failures.

Solution

Add content-type validation so that when a reference exists in entryMetaData, the audit also checks that the referenced entry's content type is allowed by reference_to. Invalid references are now reported and can be fixed.

Changes

Area	Change
Helper	Added isRefContentTypeAllowed(refCtUid, referenceTo, config?) to centralize the content-type check
Audit – reference fields	In validateReferenceValues, when ref exists, validate content type and report if invalid
Audit – JSON RTE	In jsonRefCheck, when ref exists, validate content type and report if invalid
Fix – reference fields	In fixMissingReferences, filter out refs with invalid content type and record in missingRefs
Fix – JSON RTE	In jsonRefCheck, return null when CT invalid in fix mode so fix path removes the embed

Edge Cases Handled

Case	Handling
reference_to undefined/null	Skip check (no restriction)
reference_to string	Normalize to [reference_to]
reference_to empty array	No refs allowed; invalid if ref present
refCtUid undefined	Skip check (cannot determine)
refCtUid in skipRefs (e.g. sys_assets)	Allow
Reference as string "blt..."	Use refExist.ctUid from metadata
Reference as { uid, _content_type_uid }	Prefer _content_type_uid, fallback refExist.ctUid
JSON RTE attrs	Use content-type-uid (kebab-case)

Testing

• Unit tests: 7 for isRefContentTypeAllowed, 3 for validateReferenceValues, 1 for JSON RTE audit, 1 for fixMissingReferences, 1 for jsonRefCheck fix mode
• TDD: Tests written first, then implementation
• All 140 unit tests pass

Files Changed

• packages/contentstack-audit/src/modules/entries.ts – implementation
• packages/contentstack-audit/test/unit/modules/entries.test.ts – unit tests

[sunil-lakshman]

LGTM