Price reminder and init approval

* Start price reminder grain

* Add config and init grain at startup

* Save init wallet when already init

src/Managing.Infrastructure.Database/PostgreSql/ManagingDbContext.cs

@@ -64,6 +64,9 @@ public class ManagingDbContext : DbContext
             entity.Property(e => e.Type)
                 .IsRequired()
                 .HasConversion<string>(); // Store enum as string
+            entity.Property(e => e.IsGmxInitialized)
+                .IsRequired()
+                .HasDefaultValue(false); // Default value for new records
 
             // Create unique index on account name
             entity.HasIndex(e => e.Name).IsUnique();