Settings takes a persona's whole archive away and brings one back

Data import/export gains the persona's archive (PrivaPub's /clientapi/persona/{id}/archive): made on PrivaPub in
Mastodon's account-archive layout and downloaded through a link; and an archive, its own or Mastodon's, uploaded in
pieces straight from the picked file (js/transfer.js) and imported into the persona, the parts chosen (likes, located
and scheduled posts only when ticked), with progress, a report of what came and what was left out, and Stop. Imported
posts are delivered to no one.

e2e: a town persona's archive downloaded and imported into another, whose profile then shows the posts; the copies are
taken away after.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

Program.cs

@@ -45,6 +45,7 @@ builder.Services.AddOptions()
 	.AddScoped<AccountService>()
 	.AddScoped<PortabilityService>()
 	.AddScoped<AdminService>()
+	.AddScoped<ArchiveService>()
 	.AddScoped<ListService>()
 	.AddScoped<FilterService>()
 	.AddScoped<DiscoveryService>()