ci: bump Metal screenshot step timeout from 30 to 45 minutes

The Metal screenshot pipeline hit the 30-minute step timeout on the
latest PR run. Tracing the device-runner.log: the suite reached
TabsTheme_light (~13 min into test execution), captured 111533
PNG bytes + 84124-byte preview chunk stream at preview_quality=6
(still over the 20480-byte preview cap), then went silent for
~18 minutes before the timer killed it. No FATAL / Test-failure
markers - just dead air on the logcat replay.

The earlier passing Metal run finished ~28 minutes in, so the suite
is consistently running right at the wall. Bump the timeout to 45
minutes - matches the build-ios job's own cap and the iOS Metal
runner's natural ceiling - so a borderline-slow chunk-stream replay
doesn't get conflated with a real Metal port hang.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: shai-almog

.github/workflows/scripts-ios.yml

@@ -408,7 +408,18 @@ jobs:
             "${{ steps.build-ios-app.outputs.workspace }}" \
             "" \
             "${{ steps.build-ios-app.outputs.scheme }}"
-        timeout-minutes: 30
+        # The Metal screenshot suite has been running right at the
+        # 30-min wall on several recent PRs (the suite finishes ~28m
+        # into the step). The latest run timed out around TabsTheme
+        # after the runner appeared to stall on the preview-chunk
+        # streaming for a particularly large capture (preview JPEG
+        # blew past max_preview_bytes even at quality=6 and the
+        # logcat replay went silent for ~18 minutes before the timer
+        # fired). Bump to 45 minutes so we get headroom for the
+        # logcat-buffer recovery path and don't conflate "Metal port
+        # genuinely hung" with "step timer fired during a slow
+        # chunk-stream replay" - the two need different responses.
+        timeout-minutes: 45
 
       - name: Publish Metal screenshot summary
         # Surfaces run-ios-ui-tests.sh's comparison result in the job's