fix: newly missing fars

[erights]

Y'all gotta declare all far objects, really.

[erights]

@FUDCo please see the errors from #3525 , after rebasing on this one, which look like

 virtualObjects › representatives › virtual object gc

  test/virtualObjects/test-representatives.js:469

   468:   }                                                                     
   469:   t.deepEqual(remainingVOs, {                                           
   470:     'v1.vs.vom.o+1/2': '{"label":{"body":"\\"thing #2\\"","slots":[]}}',

  Difference:

    {
      'v1.vs.vom.o+1/2': '{"label":{"body":"\\"thing #2\\"","slots":[]}}',
  +   'v1.vs.vom.o+1/2.refCount': '0 0',
      'v1.vs.vom.o+1/3': '{"label":{"body":"\\"thing #3\\"","slots":[]}}',
  -   'v1.vs.vom.o+1/4': '{"label":{"body":"\\"thing #4\\"","slots":[]}}',
  -   'v1.vs.vom.o+1/5': '{"label":{"body":"\\"thing #5\\"","slots":[]}}',
  -   'v1.vs.vom.o+1/6': '{"label":{"body":"\\"thing #6\\"","slots":[]}}',
  +   'v1.vs.vom.o+1/3.refCount': '1 0',
  +   'v1.vs.vom.o+1/8': '{"label":{"body":"\\"thing #8\\"","slots":[]}}',
  +   'v1.vs.vom.o+1/9': '{"label":{"body":"\\"thing #9\\"","slots":[]}}',
    }

  › test/virtualObjects/test-representatives.js:469:5

  ─

  1 test failed
  12 known failures

[FUDCo]

I understand, but ergonomically this is very irritating. I'm thinking this could be moved one level higher, into the vat initialization code that calls buildRootObject.