feat(udt-011): T400.30 — inject TimeProvider into Infrastructure critical services

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.

src/api/SIGCM2.Infrastructure/DependencyInjection.cs

@@ -68,7 +68,10 @@ public static class DependencyInjection
         });
 
         services.AddScoped<IJwtService>(sp =>
-            new JwtService(sp.GetRequiredService<RSA>(), sp.GetRequiredService<JwtOptions>()));
+            new JwtService(
+                sp.GetRequiredService<RSA>(),
+                sp.GetRequiredService<JwtOptions>(),
+                sp.GetRequiredService<TimeProvider>()));
         services.AddScoped<IPasswordHasher, BcryptPasswordHasher>();
         services.AddSingleton<IRefreshTokenGenerator, RefreshTokenGenerator>();
         services.AddHttpContextAccessor();