Task: Retire redundant or invalid tests identified by the inventory

[RtlZeroMemory]

Parent EPIC: #325

Problem:

The suite will stay noisy unless redundant and invalid tests are actively removed.

Scope:

• Retire tests marked delete or merge once stronger coverage exists.
• Keep a short record of why a removed test no longer adds value.
• Avoid removing lower-level contract tests that still protect unique boundaries.

Done when:

• Tests marked for retirement are removed in a controlled way.
• The remaining suite is smaller in noise and stronger in contract value.

Notes:

• This task should produce work that is reviewable against expected behavior, not current implementation shape.
• Keep outputs straight to the point and tied to repo code or repo process.

[RtlZeroMemory]

Implemented in PR #368: #368

What changed:

• removed the five bootstrap-only constraint wrapper files that EPIC 320 classified delete
• promoted the real assertion files to the primary .test.ts names so no assertion coverage was lost

What was verified:

• npm run build passed after the rename/delete cleanup
• the release-critical package and terminal slices still passed after the cleanup
• repo search no longer finds .test.impl references in source files

What was intentionally left out:

• rewrite-only false-confidence suites were not removed just because they are awkward or low-fidelity

Remaining ambiguity:

• hooks.useState, reconcile.keyed, and the remaining HSR helper-shape tests stay in place because the current repo state still does not provide a clearly stronger merged replacement for every contract they guard