Partition `file_change` by `HASH (file_id)` in 16 partitions, with the
same bounds as `file_data`, so a join between them is resolved partition
by partition. The primary key becomes `(file_id, id)`, which a
partitioned table needs, and every access filters by `file_id`.
The new table carries a `kind` column (1 snapshot, 2 revision) as a
reserve: the queries still tell them apart by the label, and `kind`
takes over when they are rewritten. The payload of a snapshot stays in
`file_data`; the `data` column is kept for reading old `legacy-db`
payloads.
The four snapshot commands require `file-id`, because it prunes the
partition. The objects GC locks and deletes by the pair, in batches. The
old table is kept as `file_change_legacy` as the way back.
The automatic migration refuses to run above 10 GiB or 2M rows and
points to the runbook; big instances partition online with that runbook,
which copies by id, follows the `updated_at` watermark in delta passes
and checks that no row of the source is missing from the target.
Closes#12416
AI-assisted-by: deepseek-v4.1-flash
* ✨ Adds static dispatch safe stubs in tests
* 🐛 Fix shapesColors metadata key to match ColorShapeInfo
* 🐛 Fix CommentThread.remove rejecting the owner's own threads
* 🐛 Fix page.removeCommentThread throwing on a spurious Promise
* ✨ Implement ShapeBase.swapComponent in the plugin API
* ✨ Expose File.revn in the plugin API
* 🐛 Fix FileVersion.createdAt calling Luxon method on a js/Date
* 🐛 Fix plugin font/typography application to text and ranges
* 🐛 Default plugin overlay interaction position for non-manual types
* 🐛 Fix plugin interaction setters passing an id-only shape
* 🐛 Fix grid addColumnAtIndex rejecting valid track types
* 🐛 Expose libraryId on library color/typography/component proxies
* ✨ Implement LibraryTypography.setFont in the plugin API
* 🐛 Fix typography.applyToTextRange reading unexposed range bounds
* 🐛 Fix utils.geometry.center argument mismatch
* 🐛 Fix localStorage.removeItem calling getItem
* 🐛 Fix shape backgroundBlur proxy key casing
* 🐛 Report boolean shape type as 'boolean' in the plugin API
* 🐛 Return the resulting paths from plugin flatten
* 🐛 Make plugin z-order methods act on the target shape
* 🐛 Make is-variant-container? return a boolean
* ✨ Implement Group.isMask in the plugin API
* 🐛 Return a shape proxy from TextRange.shape
* 🐛 Return the duplicated set from TokenSet.duplicate
* 🐛 Fix theme addSet/removeSet reading set name with a keyword
* 🐛 Accept string fontFamilies token value in the plugin API
* 🐛 Fix combineAsVariants ignoring the passed component ids
* 🐛 Fix board removeRulerGuide ignoring its argument
* 🐛 Fix board guides setter schema and parser
* 🐛 Avoid 0-byte allocation when syncing empty grid tracks
* 🐛 Validate grid track indices in the plugin API
* 🐛 Return null for empty input in group() and centerShapes()
* 🐛 Return TokenTypographyValue[] from a typography token's resolvedValue
* 🐛 Return TokenShadowValue[] from a shadow token's resolvedValue
* 🐛 Return string[] from a fontFamilies token's resolvedValue
* 🐛 Clear mutually-exclusive reps when setting LibraryColor gradient/image
* 🐛 Add readonly tags to types, deprecate Image type
* 📚 Update plugins changelog
