fix(knowledge): shrink the member lifecycle budget tests so they stop timing out in CI

[waleedlatif1]

Summary

• The two budget-boundary tests in member-document-lifecycle.integration.ts sized their fixtures off the production reconcile budget (20 pages × 500), so each seeded 10k+ documents and intermittently hit the 30s test timeout on CI Postgres
• Mock MEMBER_TOMBSTONE_RECONCILE_PAGES_PER_RUN to 3 for this file only; the tests derive their sizes from the constant, so they still cover the cursor save/resume and multi-run pass semantics with ~2k documents
• Three pages (not two) keeps "walks multiple batches" finishing its ~1.1k stale documents in one run

Type of Change

• Bug fix (flaky test)

Testing

• bun run test:integration member-document-lifecycle: 3/3 green, file runtime 11.5–16s → ~3.1s locally
• Mutant that ignores the page budget in reconcileUnobservedPages still fails both budget tests
• bun run check:test-patterns, bun run lint, bun run check:audits (52 audits), docs-manifest:check

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Sep 29, 2026 4:51am UTC

[cubic-dev-ai]

No issues found across 1 file

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}

[greptile-apps]

Confidence Score: 5/5

[Medium risk] Test file mocks a production configuration constant.

The PR appears safe to merge; the smaller test budget preserves the intended boundary coverage.

Summary

The PR limits the reconciliation page budget within one integration test file, reducing fixture sizes while retaining the budget-boundary scenarios.

• Production reconciliation limits are unchanged.
• No actionable issue caused by the change was identified.

_{Reviews (1) · Last reviewed commit: "fix(knowledge): shrink the member lifecy..."}