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#1: assert a URL-form / mixed-case caller id is normalized to the bare canonical form in the papers upsert (the fix's whole point; existing DQ-5 test only used a bare caller). #4: assert ra_grobid_backfill.main() opens two separate connections (read released before the GROBID loop, fresh one for the write) rather than holding one across the loop. Both pass; ruff clean. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>