Merge PR #1028: add document API with atomic edits

Add the typed document facade and plugin IPC adapter. Prepare bulk edits
before mutation, preserve undo and dirty state, keep profile elevations,
validate numeric inputs and session bindings, and generate Python constructors
with typed results.

Reuse existing entity transforms and profile conversion. Compute mass
properties and closed-surface bounds in cadkernel; pin its main revision
6a5e6fc2822f6af6b2611cd605b44437b35158f0. Keep plugin API metadata at version 6.

Validation: 646 native application tests, 597 kernel tests, 12 document API
tests, 91 plugin API tests, 3 Python tests, default/IPC feature builds and
wasm32 check passed.

crates/ocs_doc_api/src/lib.rs

@@ -0,0 +1,66 @@
+//! Typed document operations, queries and facades over in-process or IPC transports.
+
+pub mod error;
+pub mod id;
+pub mod revision;
+
+#[cfg(feature = "host")]
+pub mod backend;
+#[cfg(feature = "host")]
+pub mod convert;
+#[cfg(feature = "host")]
+pub mod executor;
+#[cfg(feature = "host")]
+pub mod geom;
+#[cfg(feature = "host")]
+mod validation;
+
+pub mod envelope;
+pub mod facade;
+pub mod ops;
+pub mod query;
+pub mod transport;
+
+// Append-only wire enums, maintained alongside the DTOs and spec.
+pub mod gen {
+    pub mod ops {
+        include!("gen/ops_gen.rs");
+    }
+    pub mod query {
+        include!("gen/query_gen.rs");
+    }
+    pub use ops::Operation;
+    pub use query::Query;
+}
+
+pub use error::{ApiError, ApiResult, GeometryErrorKind};
+pub use id::ObjectId;
+pub use revision::GeometryRevision;
+
+pub use envelope::{DocApiEnvelope, EnvelopeBody, OpOutcome, Receipt};
+pub use facade::{
+    ArcCurve, Circle, CurveCollection, Dimension, DocApi, Document, Ellipse, Entity,
+    EntityCollection, HasId, Line, MText, OpGroup, Point, Polyline, QueryBatch, QueryResults, Ray,
+    Solid, SolidCollection, Spline, Text, XLine,
+};
+pub use ops::{BoolOp, Curve2Spec, EntitySpec, Operation, PlacementSpec, SolidPrimitive};
+pub use query::{Aabb, EntityView, Query, QueryResult};
+
+#[cfg(feature = "host")]
+pub use convert::{
+    bulge_arc_segment, curve_spec_to_entity, entity_bounds, entity_kind_name,
+    entity_to_profile_curves, transform_entity_geometry,
+};
+pub use transport::Transport;
+
+/// The crate's own wire-envelope protocol version (`DocApiEnvelope::version`).
+/// Bump when the envelope layout or `Operation`/`Query` discriminants change.
+/// Bridges must check this before speaking (see `bindings/README.md`).
+pub const ENVELOPE_VERSION: u16 = 1;
+
+/// The generated binding handover schema: object model + method
+/// signatures + op/query mapping with curated wire vocabulary. Single,
+/// self-contained, versioned with [`ENVELOPE_VERSION`].
+pub fn binding_schema_json() -> &'static str {
+    include_str!("gen/binding_schema.json")
+}