keep launcher cleanup from aborting on docker stderr warnings

docker/compose emit warnings on stderr (e.g. nothing to remove), which
tripped ErrorActionPreference=Stop and killed the run before the clone.
soften the preference around the best-effort cleanup steps.

scripts/Start-ShopDBDev.ps1

@@ -61,6 +61,13 @@ function Clear-InterruptedRun {
 	)
 
 	if (Get-Command docker -ErrorAction SilentlyContinue) {
+		# docker/compose write warnings to stderr (e.g. "No resource found to
+		# remove"), which would trip $ErrorActionPreference='Stop' and abort the
+		# whole run. These cleanup steps are best-effort, so soften the preference
+		# and swallow all streams for their duration.
+		$previous = $ErrorActionPreference
+		$ErrorActionPreference = 'Continue'
+		try {
 			# Only try compose down when the engine is actually responding, otherwise
 			# skip quietly - a fresh box may not have Docker started yet.
 			docker info *> $null
@@ -73,6 +80,10 @@ function Clear-InterruptedRun {
 				docker builder prune -f *> $null
 			}
 		}
+		finally {
+			$ErrorActionPreference = $previous
+		}
+	}
 
 	# A directory that exists but has no valid .git is a broken/partial clone;
 	# remove it so the clone below can start fresh instead of failing.