Fix dev-db.ps1 status to exit cleanly when container is absent

docker inspect exits non-zero when the container is missing; under
$ErrorActionPreference='Stop' that propagated and made `dev-db.ps1
status` exit 1 even though the script printed the right output. Swallow
the inner exit code locally so callers see exit 0.

scripts/dev-db.ps1

@@ -34,8 +34,13 @@ $Image = 'postgres:17'
 $ConnectionString = 'Host=localhost;Database=yeschef;Username=yeschef;Password=yeschef'
 
 function Get-ContainerState {
-    $state = docker inspect --format '{{.State.Status}}' $Name 2>$null
-    if ($LASTEXITCODE -ne 0) { return 'absent' }
+    # docker inspect exits non-zero when the container is missing; swallow
+    # that so $ErrorActionPreference='Stop' doesn't abort the script and
+    # so the caller's exit code stays clean.
+    $state = & docker inspect --format '{{.State.Status}}' $Name 2>$null
+    $code = $LASTEXITCODE
+    $global:LASTEXITCODE = 0
+    if ($code -ne 0) { return 'absent' }
     return $state
 }