Revert "Feat: Reforma de unificación de bases de datos."

This reverts commit 32cf2ba74a.

# Conflicts:
#	Backend/MotoresArgentinosV2.API/Program.cs

Backend/MotoresArgentinosV2.Infrastructure/Data/InternetDbContext.cs

@@ -0,0 +1,36 @@
+// Backend/MotoresArgentinosV2.Infrastructure/Data/InternetDbContext.cs
+using Microsoft.EntityFrameworkCore;
+using MotoresArgentinosV2.Core.DTOs;
+
+namespace MotoresArgentinosV2.Infrastructure.Data;
+
+/// <summary>
+/// Contexto de Entity Framework para la base de datos Internet (legacy)
+/// Servidor: ...
+/// Base de Datos: internet
+/// Propósito: Acceso a datos de avisos web
+/// </summary>
+public class InternetDbContext : DbContext
+{
+    public InternetDbContext(DbContextOptions<InternetDbContext> options) : base(options)
+    {
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+
+        // Registrar el DTO como entidad sin llave (Keyless) para que SqlQueryRaw funcione bien
+        modelBuilder.Entity<DatosAvisoDto>(e =>
+        {
+            e.HasNoKey();
+            e.ToView(null); // No mapea a tabla
+
+            // Configurar precisión de decimales para silenciar warnings
+            e.Property(p => p.ImporteSiniva).HasColumnType("decimal(18,2)");
+            e.Property(p => p.ImporteTotsiniva).HasColumnType("decimal(18,2)");
+            e.Property(p => p.PorcentajeCombinado).HasColumnType("decimal(18,2)");
+            e.Property(p => p.Centimetros).HasColumnType("decimal(18,2)");
+        });
+    }
+}

Backend/MotoresArgentinosV2.Infrastructure/Services/AvisosLegacyService.cs

@@ -10,10 +10,10 @@ namespace MotoresArgentinosV2.Infrastructure.Services;
 
 public class AvisosLegacyService : IAvisosLegacyService
 {
-    private readonly EldiaDbContext _context;
+    private readonly InternetDbContext _context;
     private readonly ILogger<AvisosLegacyService> _logger;
 
-    public AvisosLegacyService(EldiaDbContext context, ILogger<AvisosLegacyService> logger)
+    public AvisosLegacyService(InternetDbContext context, ILogger<AvisosLegacyService> logger)
     {
         _context = context;
         _logger = logger;

Backend/MotoresArgentinosV2.Infrastructure/Services/LegacyPaymentService.cs

@@ -20,7 +20,7 @@ public class LegacyPaymentService : ILegacyPaymentService
 
     public LegacyPaymentService(IConfiguration config, MotoresV2DbContext v2Context, ILogger<LegacyPaymentService> logger)
     {
-        _internetConn = config.GetConnectionString("eldia") ?? "";
+        _internetConn = config.GetConnectionString("Internet") ?? "";
         _v2Context = v2Context;
         _config = config;
         _logger = logger;

Backend/MotoresArgentinosV2.Infrastructure/Services/UsuariosLegacyService.cs

@@ -9,10 +9,10 @@ namespace MotoresArgentinosV2.Infrastructure.Services;
 
 public class UsuariosLegacyService : IUsuariosLegacyService
 {
-    private readonly EldiaDbContext _context;
+    private readonly InternetDbContext _context;
     private readonly ILogger<UsuariosLegacyService> _logger;
 
-    public UsuariosLegacyService(EldiaDbContext context, ILogger<UsuariosLegacyService> logger)
+    public UsuariosLegacyService(InternetDbContext context, ILogger<UsuariosLegacyService> logger)
     {
         _context = context;
         _logger = logger;