feat: add organization domain foundation

backend/src/Socialize.Api/Modules/Organizations/Data/OrganizationModelConfiguration.cs

@@ -0,0 +1,41 @@
+using Microsoft.EntityFrameworkCore;
+
+namespace Socialize.Api.Modules.Organizations.Data;
+
+public static class OrganizationModelConfiguration
+{
+    public static ModelBuilder ConfigureOrganizationsModule(this ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<Organization>(organization =>
+        {
+            organization.ToTable("Organizations");
+            organization.HasKey(x => x.Id);
+            organization.Property(x => x.Name).HasMaxLength(256).IsRequired();
+            organization.Property(x => x.Slug).HasMaxLength(128).IsRequired();
+            organization.Property(x => x.CreatedAt)
+                .ValueGeneratedOnAdd()
+                .HasDefaultValueSql("CURRENT_TIMESTAMP");
+            organization.HasIndex(x => x.Slug).IsUnique();
+            organization.HasIndex(x => x.OwnerUserId);
+        });
+
+        modelBuilder.Entity<OrganizationMembership>(membership =>
+        {
+            membership.ToTable("OrganizationMemberships");
+            membership.HasKey(x => x.Id);
+            membership.Property(x => x.Role).HasMaxLength(64).IsRequired();
+            membership.Property(x => x.CreatedAt)
+                .ValueGeneratedOnAdd()
+                .HasDefaultValueSql("CURRENT_TIMESTAMP");
+            membership.HasIndex(x => x.OrganizationId);
+            membership.HasIndex(x => x.UserId);
+            membership.HasIndex(x => new { x.OrganizationId, x.UserId }).IsUnique();
+            membership.HasOne<Organization>()
+                .WithMany()
+                .HasForeignKey(x => x.OrganizationId)
+                .OnDelete(DeleteBehavior.Cascade);
+        });
+
+        return modelBuilder;
+    }
+}