Add a reproducible opt-in shared/distinct-parent workload with SQL and latency measurements, exact visibility assertions and bounded pool checks. Correct the fixture's unpooled connection churn to match the host provider; no runtime capacity claim.
Co-Authored-By: Codex <noreply@openai.com>
Measure actual SQL calls with pg_stat_statements and preserve visible count, top-ten order and permission revocation. Focused real PostgreSQL fixture passes.
Co-Authored-By: Codex <noreply@openai.com>
Preserve exact visible counts and due-date top ten without retaining all matching rows. Recheck authorization per page and request. Full verification passes 193 tests and coverage gates.
Co-Authored-By: Codex <noreply@openai.com>