- Eagerly call CancelAfter(InfiniteTimeSpan) after a successful probe so the pending OS
timer is released on the happy path rather than held for the full timeout window.
- Add ProbeTimeout_Unhealthy test: 50 ms timeout with an infinite-blocking probe delegate
asserts Unhealthy, covering the timeout code path.
- Fix ProbeQueryThrows_Unhealthy to use Task.FromException rather than a synchronous throw,
accurately modelling a faulted async delegate.
- Wrap all BuildServiceProvider() results in await using so ServiceProvider is disposed
after each test (no DI provider leak).
- Remove unused Microsoft.EntityFrameworkCore.InMemory package reference; tests use
SQLite only (InMemory CanConnect semantics differ and the package was not exercised).
- Add <remarks> to DatabaseHealthCheck<TContext> noting the scoped-resolution path is
safe for AddDbContextPool (scope dispose returns context to pool, not destroys it).
Joseph Doherty