Default autostart update-check interval to 1 minute

The no-change path is a single `git fetch`, so polling master every minute
costs nothing and lines up with the VPS's own 60s deploy timer instead of
lagging it by up to five.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

scripts/install-autostart.ps1

@@ -24,14 +24,16 @@
     Idempotent - safe to re-run.
 
 .PARAMETER IntervalMinutes
-    How often to check master for updates. Default 5.
+    How often to check master for updates. Default 1 — the no-change path is a
+    single `git fetch`, so checking every minute costs nothing and matches the
+    VPS's own 60s deploy timer.
 
 .PARAMETER SkipClicker
     Register only the dashboard, leaving the clicker to be run by hand.
 #>
 [CmdletBinding()]
 param(
-    [int]$IntervalMinutes = 5,
+    [int]$IntervalMinutes = 1,
     [switch]$SkipClicker
 )