[connectivity-ai]

Failure

Enrichment Migrator extracts through AssetExporter, which never preloaded the data-domain cache (MeshExporter already does, since #2561). When an asset's domain is a sub-domain:

1. DataDomainXformer.encodeFromGuid looks up the sub-domain by GUID.
2. DataDomainCache.getIdentityForAsset reads the parent's identity from the cache only.
3. On a cold cache the parent is absent, so the domain is exported as Child instead of Parent@Child.
4. On load, the preloaded cache keys domains by full path, so getByIdentity("Child") misses and the run throws Domain not found (in domainGUIDs).

It only worked when another in-scope asset happened to sit in the parent domain and was processed first, which is order-dependent under the parallel stream.

Fix

• AssetExporter.export() preloads the data-domain cache before streaming, the same as MeshExporter does after fix(asset-export-basic): preload domain cache to fix truncated hierarchy paths (CSA-444) #2561.
• DataDomainCache.lookupById now fetches and caches a missing parent by GUID before computing the child's identity. It recurses one level per ancestor. Every exporter now gets the full path even without a preload. refreshCache (the preload) is unchanged.
• DataDomainCache is now open, and the single-domain search moved into protected open fun fetchById(guid), so a test can serve domains from memory. Production behaviour of that search is unchanged.

Test

package-toolkit/runtime/src/test/kotlin/cache/DataDomainCacheSubDomainTest.kt is a pure unit test with no tenant. It serves domains from an in-memory subclass and makes the same two calls encodeFromGuid makes (getByGuid, then getIdentity) on a cold cache:

• subDomainOnColdCacheResolvesToFullPath expects Parent@Child.
• nestedSubDomainOnColdCacheResolvesEveryAncestor expects Grandparent@Parent@Child.

Seen failing first. The test landed in its own commit (6d16d1d), before the fix. CI pr-test on that commit failed with expected [Parent@Child] but found [Child] and expected [Grandparent@Parent@Child] but found [Child]. After the fix commit (8a014bc), pr-build and pr-test both pass.

What ran

• CI pr-build (assemble, shadowJar, spotlessCheck) and pr-test (./gradlew testClasses test) on both commits, with the results above.
• Locally, ./gradlew :package-toolkit:runtime:test --tests 'cache.DataDomainCacheSubDomainTest' could not configure. The managed Gradle repository firewall does not serve the kotlin-dsl 5.2.0 plugin that buildSrc needs, and --offline has no cached copy. So CI is the only place these ran.
• No integration test or tenant was used.

Related: CONNECT-3803, #2561.

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