[draft tally] v2-2026-07-28 integration branch vs main

[felixweinberger]

Standing draft — running tally of the v2-2026-07-28 integration branch vs main. Not for merging in this form.

Work toward the 2026-07-28 (draft) revision accumulates on v2-2026-07-28 via reviewed chunk PRs (e.g. #2281, #2285). This draft exists to:

• show the live combined diff vs main (size + surface at a glance),
• run CI on the merge ref, so drift between the branch and main (conflicts, or changes on main that break the combined state) surfaces here immediately rather than at the end.

When the branch is complete it gets merged to main either wholesale or re-sliced into reviewable PRs — decided then. History note: this PR briefly existed as a CI carrier for an earlier wholesale push of the branch; the branch was reset and now grows chunk-by-chunk.

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commit: 3d7b726

[felixweinberger]

Superseded by the proper integration-branch setup: v2-2026-07-28 now starts from main with CI push triggers, and work arrives as reviewed chunk PRs targeting the branch (pull_request CI is unfiltered). No carrier PR needed.