test: cover DBOPS changeset validation, diagnose step guard, CCM filters

[cursor]

Description

Daily test-coverage automation run targeting recently merged production paths with weak or missing regression tests.

Risky behavior now covered

1. database_changeset_existence bodyBuilder validation ([feat]: [DBOPS-2684]: DBOPS changeset existence check API addition #679) — rejects missing/empty changeset_ids, >100 ids, non-string/blank entries; accepts changeSetIds alias; trims whitespace before API call.
2. harness_diagnose pipeline single-step guard (feat: unify pipeline_summarizer into failure+success analyzer with RCA #691) — when step_id is present, include_all_step_logs is suppressed so single-step URLs do not leak whole-pipeline logs or confuse downstream summarizer mode detection.
3. CCM recommendation count/stats paired-filter guard (Add new tool for ccm recommendations filters #617) — cost_category without cost_buckets does not emit costCategoryDTOs, matching existing list behavior.

Test files added/updated

• tests/registry/dbops.test.ts — 7 new validation cases for changeset existence
• tests/tools/diagnose/pipeline.test.ts — step_id + include_all_step_logs guard
• tests/registry/registry.test.ts — count/stats paired-filter guard

Why these tests materially reduce regression risk

• DBOPS: Invalid batch requests previously only failed at the API; client-side validation is now locked so agents get immediate, actionable errors and bad payloads never hit the wire.
• Diagnose: The feat: unify pipeline_summarizer into failure+success analyzer with RCA #691 guard prevents a mode-detection bug where pipeline_summarizer could enter whole-pipeline mode on a single-step URL — wasteful log fetches and wrong analysis scope.
• CCM: Count/stats could silently ignore a lone cost_category filter if the paired guard regressed; tests mirror the list contract.

Type of Change

• Bug fix
• New feature
• Refactor
• Documentation
• Other — test coverage

Checklist

• pnpm test passes (targeted: dbops, diagnose/pipeline, registry — 235 tests)
• pnpm typecheck passes
• pnpm build passes
• pnpm standards:check passes
• pnpm docs:check passes

  

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}