Add audit logs.

API/ROLAC.API/Data/Logging/LogDbContext.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore;
+using ROLAC.API.Entities.Logging;
+
+namespace ROLAC.API.Data.Logging;
+
+/// <summary>
+/// A minimal, write-mostly context dedicated to the SystemLog / AuditLog tables. It is the
+/// structural break that prevents log-storms: it is registered WITHOUT the audit interceptors
+/// and with a silent logger factory (see Program.cs), so persisting a log row produces no log
+/// events that the DB sink would pick up. It shares the same physical database/connection as
+/// AppDbContext, but the tables themselves are created by AppDbContext's migration — they are
+/// only mapped here so this context can read/write them.
+/// </summary>
+public class LogDbContext : DbContext
+{
+    public LogDbContext(DbContextOptions<LogDbContext> options) : base(options) { }
+
+    public DbSet<SystemLog> SystemLogs => Set<SystemLog>();
+    public DbSet<AuditLog>  AuditLogs  => Set<AuditLog>();
+
+    protected override void OnModelCreating(ModelBuilder builder)
+    {
+        base.OnModelCreating(builder);
+        LogModelConfiguration.Configure(builder);
+    }
+}