feat: preserve adaptive sketch profiles and curved modeling workflows

crates/doc/src/format.rs

@@ -33,13 +33,16 @@
 //!   their space; saved coordinates are never rewritten during migration.
 //! - 11: durable sketch face anchors, explicitly periodic fit splines and versioned revolve
 //!   conventions. Absent markers retain legacy attachment and interpolation behavior.
+//! - 12: persistent analytic offset boundary roles and association profile references.
+//!   Older analytic chains retain their source/output correspondence and saved geometry;
+//!   migration never invents retired entities or renumbers existing curves.
 
 use serde_json::Value;
 
 use crate::{DocError, Document, Result};
 
 /// The format this build writes.
-pub const FORMAT: u32 = 11;
+pub const FORMAT: u32 = 12;
 
 pub fn format_string(n: u32) -> String {
     format!("solvecraft/{n}")
@@ -52,7 +55,8 @@ pub fn version_of(s: &str) -> Option<u32> {
 
 /// JSON-level upgrades: entry `i` turns format `i + 1` into `i + 2`.
 type JsonStep = fn(&mut Value) -> Result<()>;
-const JSON_STEPS: [JsonStep; 10] = [|_| Ok(()), v2_to_v3, v3_to_v4, v4_to_v5, v5_to_v6, |_| Ok(()), |_| Ok(()), |_| Ok(()), |_| Ok(()), |_| Ok(())];
+const JSON_STEPS: [JsonStep; 11] =
+    [|_| Ok(()), v2_to_v3, v3_to_v4, v4_to_v5, v5_to_v6, |_| Ok(()), |_| Ok(()), |_| Ok(()), |_| Ok(()), |_| Ok(()), |_| Ok(())];
 
 /// Old XZ references retain their exact frame, including nested offset and angled planes.
 /// New origin references use +Y; freezing the old frame avoids changing sketch coordinates,
@@ -149,6 +153,7 @@ pub fn read(s: &str) -> Result<Document> {
     validate_versioned_geometry(&v)?;
     validate_emboss_targets(&v)?;
     validate_freeform_offsets(&v)?;
+    crate::format_offsets::validate_raw(&v)?;
     let legacy_wires = validate_wires(&v, version)?;
     validate_body_transfers(&v)?;
     for step in JSON_STEPS.iter().skip(version as usize - 1).take((FORMAT - version) as usize) {
@@ -202,6 +207,7 @@ pub fn read(s: &str) -> Result<Document> {
         }
     }
     // Fill in what older designs (and hand-edited files) may lack; a no-op otherwise.
+    crate::format_offsets::validate_typed(&d)?;
     normalise(&mut d)?;
     d.format = format_string(FORMAT);
     Ok(d)