P2-01: add SQLite WASM OPFS project worker

tests/facade.test.ts

@@ -1,6 +1,7 @@
 import { test } from 'node:test'
 import assert from 'node:assert/strict'
 import { createMockFacade } from '../src/facade/mockFacade'
+import { PROJECT_SCHEMA_MIGRATIONS, PROJECT_SCHEMA_SQL, PROJECT_SCHEMA_VERSION } from '../src/facade/projectSchema'
 
 test('facade exposes a stable initial document projection', () => {
   const facade = createMockFacade()
@@ -11,6 +12,13 @@ test('facade exposes a stable initial document projection', () => {
   assert.equal(facade.gui.workbench.getActive(), 'Part Design')
 })
 
+test('project schema is versioned and covers the FreeCAD document graph', () => {
+  assert.equal(PROJECT_SCHEMA_VERSION, 1)
+  assert.equal(PROJECT_SCHEMA_MIGRATIONS[0].version, PROJECT_SCHEMA_VERSION)
+  for (const table of ['projects', 'documents', 'objects', 'object_properties', 'dependencies', 'transactions', 'resources']) assert.match(PROJECT_SCHEMA_SQL, new RegExp(`CREATE TABLE IF NOT EXISTS ${table}`))
+  assert.match(PROJECT_SCHEMA_SQL, /CREATE INDEX IF NOT EXISTS objects_document_ordinal/)
+})
+
 test('workbench and selection changes are event driven', () => {
   const facade = createMockFacade()
   const events: string[] = []
@@ -72,6 +80,15 @@ test('document mutations use the facade history boundary', () => {
   assert.equal(facade.app.document.getActive().label, 'Untitled document')
 })
 
+test('project persistence remains behind the facade contract', async () => {
+  const facade = createMockFacade()
+  const saved = await facade.project.save()
+  assert.equal(saved.documentId, 'doc-pump-housing')
+  const loaded = await facade.project.load('doc-pump-housing')
+  assert.equal(loaded?.label, 'Pump Housing')
+  assert.equal(facade.project.capabilities().mode, 'sqlite-memory')
+})
+
 test('Part Design feature tasks commit a document object and remain undoable', () => {
   const facade = createMockFacade()
   const before = facade.app.document.getActive()