Refactor DbContext and add IRecDbContext interface

Refactored `DependencyInjection` to use a generic `TRecDbContext`
for flexibility and added scoped registration for `IRecDbContext`.
Updated `RecDbContext` to implement the new `IRecDbContext`
interface, ensuring adherence to the application-layer contract.

Introduced the `IRecDbContext` interface in the application layer,
defining `DbSet` properties for key entities and a `SaveChangesAsync`
method. Updated `ReC.Infrastructure.csproj` to reference the
application project for interface access.

src/ReC.Application/Common/Interfaces/IRecDbContext.cs

@@ -0,0 +1,19 @@
+using Microsoft.EntityFrameworkCore;
+using ReC.Domain.Entities;
+
+namespace ReC.Application.Common.Interfaces;
+
+public interface IRecDbContext
+{
+    public DbSet<EndpointParam> EndpointParams { get; }
+
+    public DbSet<RecAction> Actions { get; }
+
+    public DbSet<OutRes> OutRes { get; }
+
+    public DbSet<HeaderQueryResult> HeaderQueryResults { get; }
+
+    public DbSet<BodyQueryResult> BodyQueryResults { get; }
+
+    public Task<int> SaveChangesAsync(CancellationToken cancel = default);
+}

src/ReC.Infrastructure/DependencyInjection.cs

@@ -1,6 +1,7 @@
 using DigitalData.Core.Infrastructure;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.DependencyInjection;
+using ReC.Application.Common.Interfaces;
 using ReC.Domain.Entities;
 
 namespace ReC.Infrastructure;
@@ -16,7 +17,9 @@ public static class DependencyInjection
         if(configOpt.DbContextOptionsAction is null)
             throw new InvalidOperationException("DbContextOptionsAction must be configured.");
 
-        services.AddDbContext<RecDbContext>(configOpt.DbContextOptionsAction);
+        services.AddDbContext<TRecDbContext>(configOpt.DbContextOptionsAction);
+
+        services.AddScoped<IRecDbContext>(provider => provider.GetRequiredService<TRecDbContext>());
 
         services.AddDbRepository(opt => opt.RegisterFromAssembly<TRecDbContext>(typeof(RecAction).Assembly));
 

src/ReC.Infrastructure/ReC.Infrastructure.csproj

@@ -13,6 +13,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\ReC.Application\ReC.Application.csproj" />
     <ProjectReference Include="..\ReC.Domain\ReC.Domain.csproj" />
   </ItemGroup>
 

src/ReC.Infrastructure/RecDbContext.cs

@@ -1,9 +1,10 @@
 using Microsoft.EntityFrameworkCore;
+using ReC.Application.Common.Interfaces;
 using ReC.Domain.Entities;
 
 namespace ReC.Infrastructure;
 
-public class RecDbContext(DbContextOptions<RecDbContext> options) : DbContext(options)
+public class RecDbContext(DbContextOptions<RecDbContext> options) : DbContext(options), IRecDbContext
 {
     public DbSet<EndpointParam> EndpointParams { get; set; }