Full-stack integration test on real postgres:16-alpine (the UNIQUE(source_ref)
+ upsert-on-conflict only exist in real Postgres, never H2). Writes a
synthetic-but-real four-artifact set, runs the import twice, and asserts
person/tag/document counts are identical on re-import (no duplicates), plus
the Resolved-decision-#1 precedence: a person field edited in-app survives a
re-import. Also asserts register-first sender linkage with raw-text retention
and the provisional contract.
Fixes a re-import bug the IT surfaced: load() is now @Transactional so an
existing document's lazy receivers collection initialises within the session
(the previous self-invoked @Transactional on the per-row method never opened
a transaction). PersonTreeImporter owns its ObjectMapper rather than
depending on the web bean, which is absent in a NONE web environment.
Refs #669
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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