Fix all test compilation errors caused by T400.10/T400.20/T400.30:
- Handler constructors: add TimeProvider.System as last argument
- Domain mutator calls: add DateTime.UtcNow as explicit 'now' argument
- AuditLogger/SecurityEventLogger Build() helpers: add TimeProvider.System
- JwtService test constructors: add TimeProvider.System
Cat2 coverage already present in TimeProviderArgentinaExtensionsTests.cs:
FakeTimeProvider proves GetArgentinaToday() returns ART civil date, not UTC.
AuditLogger, SecurityEventLogger: inject TimeProvider and use
_timeProvider.GetUtcNow().UtcDateTime for occurredAt timestamps.
JwtService: inject TimeProvider; use GetUtcNow() for token IssuedAt/Expires.
DI: update JwtService factory to pass sp.GetRequiredService<TimeProvider>().
Repositories: remove ?? DateTime.UtcNow fallback in UpdateAsync since callers
always provide FechaModificacion via domain mutators.
All command handlers that call domain mutators now inject TimeProvider
via constructor and use _timeProvider.GetUtcNow().UtcDateTime as the
explicit 'now' argument. Replaces previous direct DateTime.UtcNow usage.
Remove DateTime.UtcNow calls from all With*/Deactivate/Reactivate/
CerrarVigencia/NuevaVersion domain methods. Caller (Application layer)
is now responsible for passing the UTC timestamp obtained via
_timeProvider.GetUtcNow().UtcDateTime.
