Promote as a real deployment; version state and scope dropdowns

Turns promotion into a first-class deployment (action='promote') so it lands
in the deployments UI with before/after content, per-server restart tracking,
and one-click rollback. Non-beta matching-scope servers get restart_state=
pending so the existing sweep drains and restarts them the same way drift does.

Also adds a per-version state (untested/tested/test-failed) so the upload
flow can visibly signal that a beta must land before promotion, and swaps
the scope-value text box for game/map dropdowns populated from the fleet.
Beta rollback at ready-promote is now labelled Reject and marks the version
test-failed.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/routes/api/scope-options/+server.ts

@@ -0,0 +1,12 @@
+import { json } from '@sveltejs/kit';
+import { listDistinctGames, listMapsByGame } from '$lib/server/fleet/scripts.js';
+
+// Powers the script-upload scope dropdowns. Options are always live from the
+// fleet — no caching. This is a cheap two-query call and the servers list
+// changes infrequently.
+export async function GET() {
+    return json({
+        games: listDistinctGames(),
+        mapsByGame: listMapsByGame()
+    });
+}