Breadcrumbs for assertions

src/dds.main.cpp

                 auto if_exists_action
                     = force.Get() ? dds::if_exists::replace : dds::if_exists::throw_exc;
                 for (std::string_view tgz_where : sdist_paths.Get()) {
+                    neo_assertion_breadcrumbs("Importing sdist", tgz_where);
                     auto tmp_sd
                         = (tgz_where.starts_with("http://") || tgz_where.starts_with("https://"))
                         ? dds::download_expand_sdist_targz(tgz_where)
                         : dds::expand_sdist_targz(tgz_where);
+                    neo_assertion_breadcrumbs("Importing from temporary directory",
+                                              tmp_sd.tmpdir.path());
                     repo.add_sdist(tmp_sd.sdist, if_exists_action);
                 }
                 if (import_stdin) {

src/dds/repo/repo.cpp

 }
 
 void repository::add_sdist(const sdist& sd, if_exists ife_action) {
+    neo_assertion_breadcrumbs("Importing sdist archive", sd.manifest.pkg_id.to_string());
     if (!_write_enabled) {
         dds_log(
             critical,
                 | ranges::views::transform([](const sdist& sd) { return sd.manifest.pkg_id; });
             auto avail = ctlg.by_name(name);
             auto all   = ranges::views::concat(mine, avail) | ranges::to_vector;
-            ranges::sort(all, std::less<>{});
-            ranges::unique(all, std::less<>{});
+            ranges::sort(all, std::less{});
+            ranges::unique(all, std::less{});
             return all;
         },
         [&](const package_id& pkg_id) {

src/dds/source/dist.cpp

 }
 
 temporary_sdist dds::expand_sdist_targz(path_ref targz_path) {
+    neo_assertion_breadcrumbs("Expanding sdist targz file", targz_path.string());
     auto infile = open(targz_path, std::ios::binary | std::ios::in);
     return expand_sdist_from_istream(infile, targz_path.string());
 }