fix(server): stagger Sentinel version and patch checks per server

Servers no longer all connect at minute 0. The hourly Sentinel check uses
a per-server minute, and the weekly patch check uses a per-server time on
Sunday between 04:00 and 23:59.

tests/Unit/ServerManagerJobSentinelCheckTest.php

@@ -16,6 +16,7 @@ use Tests\TestCase;
 uses(TestCase::class, RefreshDatabase::class);
 
 beforeEach(function () {
+    Server::flushIdentityMap();
     Queue::fake();
     Carbon::setTestNow('2025-01-15 12:00:00');
     InstanceSettings::forceCreate(['id' => 0, 'instance_timezone' => 'UTC']);
@@ -45,6 +46,8 @@ function createSentinelCheckServer(Team $team, Carbon $sentinelUpdatedAt, Server
 
 it('dispatches an hourly Sentinel version check for a healthy Sentinel', function () {
     $server = createSentinelCheckServer($this->team, Carbon::now());
+    Carbon::setTestNow(Carbon::now()->setMinute($server->id % 60));
+    $server->update(['sentinel_updated_at' => Carbon::now()]);
 
     expect($server->isSentinelEnabled())->toBeTrue()
         ->and($server->isSentinelLive())->toBeTrue();