Timeline performance sample

Verification Boundary

This suite measures real timeline reads under fixture volume; it is registered as integration evidence.

What This Suite Proves

Fixture-volume timeline reads are timed against the real database. This is a performance sample without a functional acceptance binding.

No capability or feature scenario is bound to this suite. Its executable assertions remain engineering evidence until a precise acceptance mapping is reviewed.

What It Does Not Prove

It does not establish deployed Lambda transport, live Platform policy or end-user browser behavior.

Real Dependencies and Test Doubles

The actual persistence or presentation functions execute against the migrated PostgreSQL database and fixture execution contexts.

Must Not Be Doubled

The database queries, constraints, version checks, workspace policies and transaction boundaries under assertion remain real.