* ci: run the layout-owner switch-on specs as an advisory PR job
Build the e2e app with ORCA_LAYOUT_OWNER=main through the existing e2e.yml
(new layout_owner input, read only by the app and orcad builds), run the
layout oracle, its positive control and the layout-owner acceptance specs
with the save-divergence log on, and upload a summary by kind and spec.
Not in the PR aggregate's needs.
* ci: summarize divergence logs without a test report, and drop file-path ids from kinds
* ci: switch-on job adds the stream-loss spec and the managed-SSH Docker lane, drops diff-word-wrap (fails switch off), and names each looped test in the summary
* test(e2e): editor-model-host-isolation opens both files through the store's open action, so a layout-owner build's main holds the tabs
* ci: the divergence summary skips a cut-short test report instead of failing
* ci: re-run PR checks on a merge ref that includes the main typecheck repair (#30680)