style(storage,workspace): satisfy the repository lint gate

eslint --fix formatting sweep plus the manual residue: sync method
bodies drop async behind Promise-returning signatures (the sqlite unit
routes primitives through a settle() guard preserving the never-throws-
synchronously contract), catch callbacks type their reason as unknown,
loadAll's global slot is plain unknown (null semantics stay in JSDoc),
a non-null assertion becomes a narrowing, and unsafe any assignments in
tests gain explicit types. One justified eslint-disable for
prefer-promise-reject-errors follows the core/session precedent —
wrapping would discard the original StorageError code.

packages/storage/storage-sqlite/tests/sqlite-backend.spec.ts

@@ -171,6 +171,17 @@ describe('sqlite backend specifics', () => {
     await reopened.close()
   })
 
+  it('wraps a non-Error toJSON throw into an Error rejection', async () => {
+    const backend = backendAt(':memory:')
+    const unit = await backend.kv.open(DESCRIPTOR)
+    // JSON.stringify propagates a value's own toJSON throw verbatim; the unit
+    // must still reject with an Error instance.
+    const hostile = { toJSON: () => { throw 'not an error' } }
+    await expect(unit.putRecord('records', 'k', hostile)).rejects.toThrow('not an error')
+    await expect(unit.putRecord('records', 'k', hostile)).rejects.toBeInstanceOf(Error)
+    await backend.close()
+  })
+
   it('rejects setGlobal on a unit without a global slot and writes to undeclared tables', async () => {
     const backend = backendAt(':memory:')
     const unit = await backend.kv.open({ ...DESCRIPTOR, hasGlobal: false })