gsxdsm 1d7dd3e7b8 FN-9133: Use bounded PostgreSQL DDL for reliability fixtures ...

Reliability fixtures now manage PostgreSQL databases through owned, deadline-bounded maintenance connections.

- Replace psql child-process DDL with postgres.js maintenance clients and forced cleanup.
- Remove redundant pre-create drops and preserve idempotent teardown behavior.
- Add a live-connection cleanup contract test and document audit measurements and policy.

Files changed:
 .../postgres-reliability-helper-ddl-audit.md       | 48 +++++++++++
 docs/testing.md                                    |  2 +-
 packages/engine/package.json                       |  5 +-
 .../_helpers-pg-ddl-contract.pg.test.ts            | 66 +++++++++++++++
 .../__tests__/reliability-interactions/_helpers.ts | 93 +++++++++++++---------
 pnpm-lock.yaml                                     |  3 +
 6 files changed, 176 insertions(+), 41 deletions(-)

Fusion-Task-Id: FN-9133

Fusion-Task-Lineage: 5a7f511d-abb4-4468-a97a-04331f60d245

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>

2026-08-16 16:11:21 -07:00

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