feat: add candidate FreeCAD naming SDK and attachment oracles

Build and verify the candidate-only FreeCAD naming bridge and OCCT worker path, including three-stage StringHasher restoration. Add Datum, ShapeBinder, attachment-mode, and PartDesign structure oracles plus offline SDK build plans and CI boundary checks.

native/freecad-naming-probe/smoke-test.mjs

@@ -1,8 +1,22 @@
 import createProbe from './dist/freecad-private-naming-source-probe.js'
+import { inspectWasmStaticArchive } from '../../scripts/freecad-naming-sdk-lib.mjs'
+
+const archive = await inspectWasmStaticArchive(new URL('./dist/libFreeCADPrivateNamingProbe.a', import.meta.url))
+if (archive.memberCount !== 7 || archive.wasmObjectCount !== 7 || archive.llvmBitcodeCount !== 0) {
+  throw new Error(`Unexpected FreeCAD private naming source archive: ${JSON.stringify(archive)}`)
+}
 
 const probe = await createProbe()
 const result = probe.freecadPrivateNamingSourceProbe()
 if (result !== 'Edge12;:M;CUT;:H2a:7,E') throw new Error(`Unexpected FreeCAD private naming source probe result: ${result}`)
+const stringHasherResult = probe.freecadPrivateStringHasherSourceProbe()
+if (stringHasherResult !== 'plain=1;hashed=2;mapped=5;index=12;related=2') {
+  throw new Error(`Unexpected FreeCAD StringHasher source probe result: ${stringHasherResult}`)
+}
+const elementMapResult = probe.freecadPrivateElementMapSourceProbe()
+if (elementMapResult !== 'stored=#1;:H2a,F;tag=42;original=Edge12;:M;CUT;serialized=115;restored=1') {
+  throw new Error(`Unexpected FreeCAD ElementMap source probe result: ${elementMapResult}`)
+}
 for (const forbidden of ['freecadNamingAbiVersion', 'freecadNamingCapabilitiesJson', 'freecadNamingEvidenceJson']) {
   if (typeof probe[forbidden] === 'function') throw new Error(`Source prerequisite probe must not export production ABI callback ${forbidden}.`)
 }
@@ -10,7 +24,22 @@ console.log(JSON.stringify({
   status: 'source-prerequisite-pass',
   freecadVersion: '1.1.1',
   sourceCommit: '0108fd4b4850cc46e625b60e53cea7a7bbe69f8d',
-  linkedSources: ['App/IndexedName.cpp', 'App/MappedName.cpp'],
+  linkedSources: [
+    'App/IndexedName.cpp',
+    'App/MappedName.cpp',
+    'App/StringHasher.cpp',
+    'App/MappedElement.cpp',
+    'App/ElementNamingUtils.cpp',
+    'App/ElementMap.cpp',
+    'Base/Handle.cpp',
+  ],
+  sourceArchive: {
+    name: 'libFreeCADPrivateNamingProbe.a',
+    ...archive,
+    productionEligible: false,
+  },
   result,
+  stringHasherResult,
+  elementMapResult,
   productionWorkerLinked: false,
 }, null, 2))