Add ThirdPartyModule DbSet to EGDbContextBase

Added a DbSet property for ThirdPartyModule entities in EGDbContextBase to enable management and querying of third-party modules via Entity Framework.

EnvelopeGenerator.Infrastructure/EGDbContext.cs

@@ -81,6 +81,8 @@ public abstract class EGDbContextBase : DbContext
 
     public DbSet<EnvelopeReport> EnvelopeReports { get; set; }
 
+    public DbSet<ThirdPartyModule> ThirdPartyModules { get; set; }
+
     private readonly DbTriggerParams _triggers;
 
     private readonly ILogger