Everything on, phase 4a: one answer everywhere for counts, search, collections and the instance API

Owner decision 2026-10-04: fix the mismatches and every other mismatch of the same kind.

- One counting rule (Domain/Privacy/Counted), Mastodon's. It is used for a persona's statuses_count, its outbox
  totalItems, NodeInfo localPosts and the instance status_count, which used to count four different things. It
  counts every post that is neither deleted nor a DM, boosts included, and circle and located posts too (owner
  decision). A group's count includes its remote members' posts.
- Users. Personas of banned or deleted roots no longer count, and are not found in search. NodeInfo now gives
  activeMonth and activeHalfyear, and the v2 instance gives active_month instead of a constant 0.
- replies_count counts only public and unlisted replies, so it no longer tells anyone that a private reply exists.
  Migration _012 recounts it.
- A remote account that deletes itself takes everything out of every count (GoneActors): its likes, downvotes,
  reactions and poll votes go and their counters come back, as do its boosts', replies' and quotes' counts, and its
  notifications. Lookups, account lists, search and favourited_by no longer show it. Migration _012 applies this to
  accounts already gone.
- Deleting a post also deletes its pins and the local boosts of it.
- /stalking gives the same total as following_count. Members are still never listed, and hide_collections is now
  always true, since the setting never did anything.
- Joining a community by invitation is following it, so /flock and /groupies agree; leaving unfollows.
- Search. Anyone may search, as on Mastodon; resolve and offset need a sign-in, offset pages, and deleted accounts
  are never found.
- notifications/unread_count counts what the list shows, and the owner's follower and following lists page with
  Link.
- The instance API advertises what is enforced:
  - max_characters, now enforced with a 422;
  - max_pinned_statuses = MaxPins;
  - the media types and limits MediaService and MediaOptions accept;
  - PollService's limits;
  - the configured languages;
  - no streaming URL until streaming exists.

  domain_count counts the servers we have exchanged with; which ones stays unpublished (peers is empty).
- Routes Mastodon answers now answer instead of 404:
  - directory, tags/{name}, timelines/link and identity_proofs;
  - instance/languages, translation_languages, domain_blocks and privacy_policy;
  - the v1 and v2 notification policy, and notification requests.

Also, from phase 3: a recovered password ends /clientapi sessions through a per-root SessionStamp claim instead of
comparing the JWT's whole-second nbf with the change time. That comparison let a token issued in the same second
survive, which made a test flaky.

671 tests pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ELjqpznMFMNrJoJUj6K5p2

PrivaPub/Federation/Controllers/PeasantsController.cs

@@ -84,9 +84,8 @@ namespace PrivaPub.Federation.Controllers
 
 			if (!page)
 			{
-				var total = local.Kind == LocalActorKind.Group
-					? await DB.Default.CountAsync<PostEntity>(f => f.Where(p => p.GroupId == local.Id) & f.Where(VisibilityPolicy.IsPublic), token)
-					: await DB.Default.CountAsync<PostEntity>(f => f.Where(p => p.GroupUserId == local.Id && !p.IsFederatedCopy) & f.Where(VisibilityPolicy.IsPublic), token);
+				// as Mastodon's: statuses_count, though only public posts are listed
+				var total = await Counted.PostsBy(local, token);
 				return Activity(ActivityPubRenderer.OrderedCollection(local.Outbox, (int)total, default, $"{local.Outbox}?page=true"));
 			}
 
@@ -137,7 +136,13 @@ namespace PrivaPub.Federation.Controllers
 		public async Task<IActionResult> Following(string actor, CancellationToken token)
 		{
 			var local = await _localActors.FindByUserName(actor, token);
-			return local is not { IsFederated: true } ? NotFound() : Activity(ActivityPubRenderer.OrderedCollection(local.Following, 0, default));
+			if (local is not { IsFederated: true })
+				return NotFound();
+			// the count, as following_count says it; who is followed is never listed (FEDERATION.md)
+			var following = local.Kind == LocalActorKind.Person
+				? await DB.Default.CountAsync<Following>(f => f.AvatarId == local.Id && f.State == FollowState.Accepted, token)
+				: 0;
+			return Activity(ActivityPubRenderer.OrderedCollection(local.Following, (int)following, default));
 		}
 
 		[HttpGet, Route("{actor}/flock")]

PrivaPub/Federation/Controllers/WellKnownController.cs

@@ -94,8 +94,8 @@ namespace PrivaPub.Federation.Controllers
 		[HttpGet, Route("/nodeinfo/{version:regex(^2\\.[[01]]$)}")]
 		public async Task<IActionResult> NodeInfo(string version, CancellationToken token)
 		{
-			var users = await DB.Default.CountAsync<Avatar>(a => !a.DeletionAt.HasValue, token);
-			var posts = await DB.Default.CountAsync<PostEntity>(f => f.Where(p => !p.IsFederatedCopy && p.ReblogOfPostId == null) & f.Where(VisibilityPolicy.IsPublic), token);
+			var users = await Counted.Users(token);
+			var posts = await Counted.LocalPosts(token);
 			var software = new JsonObject { ["name"] = "privapub", ["version"] = BuildInfo.Ref };
 			if (version == "2.1")
 			{
@@ -111,7 +111,12 @@ namespace PrivaPub.Federation.Controllers
 				["openRegistrations"] = _registrations.CurrentValue.IsOpen,
 				["usage"] = new JsonObject
 				{
-					["users"] = new JsonObject { ["total"] = users },
+					["users"] = new JsonObject
+					{
+						["total"] = users,
+						["activeMonth"] = await Counted.ActiveUsers(30, token),
+						["activeHalfyear"] = await Counted.ActiveUsers(180, token)
+					},
 					["localPosts"] = posts
 				},
 				["metadata"] = new JsonObject