The fold already holds the name and the read input's finished layout, so
the offset falls out there rather than at construction: `RecordLayout`
carries the resolved numbers and `set_layout` copies them into the read
slots. Constructors are untouched, and census-marker reads keep their
current installation.
A read meets the value type the name was written at, so a disagreement
between a read here and a write upstream is the same graph error as two
writes disagreeing; the one-name-one-type check now spans reads and
writes together. An absent attribute stays absent and the read serves
the forced default rather than reporting it.
`read_attribute` is the catalog's get half, typed and never `Option` at
the kernel boundary, with the name declared exactly as the write side
declares it.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* Rename "editor:layer" to "editor:layer_path" and centralize it in a const
* Centralize "editor:merged_layers" in a const
* Centralize all other attributes in consts
* Rename consts with ATTR_ prefix
* Format
* Move Vec<String> to Table<String>
* Remove old VecDVec2
* Move Vec<u8> to Table<u8>
* Move Vec<f64> to Table<f64>
* Move [f64; 4] to Table<f64>
* Move Vec<NodeId> to Table<NodeId>
* Tidy up the TaggedValue variants
* Move Vec<BrushStroke> to Table<BrushStroke>
* Add missing type implementations
* Fix tests
---------
* Fix click target propagation with the Rasterize node
* Add the 'Write Attribute' node
* Remove tag_layer in favor of the new Write Attribute node, prune redundant attribute writes
* Replace the Vector<Upstream> type argument with the "editor:merged_layers" attribute
* Feature-gate serde derives behind cfg_attr in all runtime node graph type crates
* Refactor Table to move its hard-coded fields into an attributes field
* Encapsulate TableRow/TableRowRef/TableRowMut attribute fields behind accessor methods
* Remove TaggedValue::GraphicUnused
* Refactor Table<T> to use dynamic attributes instead fixed names
* Fix code review soundness concerns
* Add todo work
* Replace row-oriented Table<T> API with column-oriented access
* Fix attribute propagation bugs
---------
