Record as merged, content NOT taken (already on development / superseded / abandoned)

The tree is unchanged: each branch below carries nothing development lacks, verified
branch by branch against origin/development before this commit.

- bundler-1/work: superseded; its check-hardcoded-english work is on development in a later form (8 of 10 subjects landed; per-locale catalogues, resolveKey, static dir="ltr" islands).
- bundler-1/hce-canary: already on development; all 7 subjects landed (76fe9ddf2, 4b0751998, 87c562d55, 982375e08, f3f57f6a0, 50a6539e1, 8a6e5543c).
- bundler-1/vertical-legend: superseded; its ListSelectorLegend was deleted from development as unreachable (c5c01dead), RegionCountryMap moved into library (c99fe68c3), the rest is on development.
- bundler-1/c2-projection-helper: already on development; the helper and its call sites landed, and its remaining hunks touch files development has since removed.
- plugin-studio/organize: superseded; parked WIP replayed as separate landings (87ebbace9, fb7ed4566, verify-map-paint GATE_VIEWPORT); its map-leaf-paints draft was superseded by verify-map-paint and check-gospel-map-paints.
- studio/mobile-flag: already on development as 9a8307706.
- studio/sweep-lib: already on development as bfc99ff82 and d314c4404.
- studio/dx-maps, studio/dx-maps-3: already on development as 09014f8a0.
- _library-for-studio: already on development as 57bf76422.
- studio/onerepo, studio/onerepo2: abandoned; auto-WIP backups of the census and rename-codemod work, whose finished parts landed separately (ab17c9b6a, 87ebbace9, cc3651919, 899118109).
- studio/round31, studio/vendor-maplibre: content taken in this branch as 7c99d1a06, 9d00aa3db, f8d0a7d9c, 8eb4e498f and fc7259e06; the originals are recorded here.
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