Everything on, phase 1: geolocation fetches itself, the deploy signs in as @thepra, the crawler is on, sign-up by invitation

Owner decisions (2026-10-04, recorded in docs/ROADMAP.md): production runs everything that is built, and nothing waits
on a person running a command.

- Geolocation updates itself. GeoUpdater, a hosted service, checks daily whether each DB-IP Lite database was built this
  month. If not, it fetches this month's, or last month's early in the month. It installs a file only once it opens as
  the right kind of database, then swaps it in atomically, and the locator reloads at once. Lookups now run under the
  lock, so a reload can no longer dispose a reader mid-lookup. The systemd timer, its script and their setup.sh lines
  are gone: the root step they needed never happened, and none is needed now. /stargazing names the database in use.
- The admin CLI runs after the app is built, with every service and nothing started.
  - `create-root <login> [--admin]` takes the password on stdin; it is how the first login is made while sign-up is
    closed.
  - `smoke <persona>` keeps the root `deploy-smoke` and an undiscoverable persona, and gives the root a new password
    on every run.
- The deploy signs in as @thepra. It runs the CLI, gets a token through the real OAuth flow (tools/smoke/oauth.sh,
  moved out of the pasture's privapub_token, which now uses it), checks the signed-in API and that @thepra is
  undiscoverable, then revokes the token. PRIVAPUB_SMOKE_TOKEN is gone.
- The deploy also fails when:
  - NodeInfo and the instance API disagree about registrations;
  - /stargazing does not say the crawler is on;
  - the geolocation databases are missing or more than 40 days old.
- The crawler is on in production, seeded with ten large servers of different kinds. FEDERATION.md now describes it
  and how to opt out.
- One registrations switch (Registrations:Mode, default Invitations; Open in tests and the pasture). It is read by
  open sign-up (403 when closed), NodeInfo `openRegistrations`, and v1 and v2 of the instance API, so they can no longer
  disagree. Before, NodeInfo said open and the instance API said closed. Group invitations always work, so
  invites_enabled is true.
- A persona edit through /clientapi no longer resets what the Mastodon API set (discoverable, locked, quote policy…):
  the theme is merged into the settings instead of replacing them.

650 tests pass. The deploy's smoke step was rehearsed against the pasture's PrivaPub.

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

PrivaPub.Tests/Http/MastodonInstanceTests.cs

@@ -28,7 +28,8 @@ namespace PrivaPub.Tests.Http
 			Assert.Equal("4.2.0 (compatible; PrivaPub)", v1.Body.Text("version"));
 			Assert.Equal(InstanceController.Version, v1.Body.Text("version"));
 			Assert.Equal(PrivaPubHost.Host, v1.Body.Text("uri"));
-			Assert.False(v1.Body.Flag("registrations"));
+			Assert.True(v1.Body.Flag("registrations"));
+			Assert.True(v1.Body.Flag("invites_enabled"));
 			Assert.True(v1.Body["stats"].Number("user_count") >= 0);
 			Assert.Equal(5000, v1.Body["configuration"]!["statuses"].Number("max_characters"));
 			Assert.Equal(4, v1.Body["configuration"]!["polls"].Number("max_options"));
@@ -41,7 +42,8 @@ namespace PrivaPub.Tests.Http
 			Assert.Equal(InstanceController.Version, v2.Body.Text("version"));
 			Assert.Equal(PrivaPubHost.Host, v2.Body.Text("domain"));
 			Assert.Equal($"wss://{PrivaPubHost.Host}", v2.Body["configuration"]!["urls"].Text("streaming"));
-			Assert.False(v2.Body["registrations"].Flag("enabled"));
+			Assert.True(v2.Body["registrations"].Flag("enabled"));
+			Assert.True((await anonymous.Get("/nodeinfo/2.1")).Ok().Body.Flag("openRegistrations"));
 			Assert.False(v2.Body["configuration"]!["translation"].Flag("enabled"));
 			Assert.Equal(7, v2.Body["api_versions"].Number("mastodon"));