Add proportional multi-object scale tool

{
  "backend": {
    "author": {
      "email": "drschwabe@fastmail.com",
      "name": "Derrick Schwabe",
      "time": 1788501358
    },
    "commit": "git:sha1:ee537a01559b1f9e54ff08f9c7d661d901e7b6cc",
    "committer": {
      "email": "drschwabe@fastmail.com",
      "name": "Derrick Schwabe",
      "time": 1788501358
    },
    "manifest": "mmm-manifest:sha256:6de61ab991758c70a08b0da2b584a4a2418a573678f7ae9dcb59abf609053844",
    "message": "Add proportional multi-object scale tool",
    "objectFormat": "sha1",
    "parents": [
      "git:sha1:477f9ed5371281aca48bb50204f44d9266fe4851"
    ],
    "ref": "refs/heads/master",
    "summary": "Add proportional multi-object scale tool",
    "tree": "git:sha1:deb634576b3face49bf114e532c906310297e001",
    "type": "git"
  },
  "issuedAt": "2026-09-04T15:15:58.273Z",
  "previous": "mmm-revision:sha256:c372e468f5ddd02624b0b056d405ff6b4a95d7f010f630dd6ba6716df3a4aed3",
  "project": "mmm1np06566gf6u8fpyj84u2emf25l98qad36700d2nlep6jzqdknp8qkyd3xu",
  "protocol": "mmm/0-alpha",
  "sequence": 52,
  "type": "mmm/revision"
}