[Hammer] Dependencies of GameObjects are not uploaded when vmap is published as a map

[chrisspieler]

Describe the bug

When a map in Hammer contains GameObjects whose components reference an asset, that asset is not listed as dependency of the .vmap/.vpk

As an example, let's look at a Hammer map whose GameObject's reference duck and crate models:

These models are not listed in the inspector as dependencies of the .vmap/.vpk:

After uploading the map to sbox.game, the .vmdl and .vmat files for the models within the map are not included in the files of the map package:
https://sbox.game/duccsoft/ducc_room/version/76447

To Reproduce

1. Open the attached project in the s&box editor
2. Open maps/ducc_room.scene
3. See that the map loaded in the Map Instance has a duck and a crate model
4. Click once on maps/ducc_room.vmap in the Asset Browser
5. See that under the Dependencies tab of the Inspector, "Is Using" doesn't show the duck or crate models.
6. Publish maps/ducc_room.vmap
7. Play the map in-game
8. See that instead of a duck or a create, you just see a couple ERROR models.

Expected behavior

Assets referenced by the GameObjects in a vmap should:

1. Be shown as dependencies of the vmap in the Inspector
2. Be uploaded alongside the map when the map is published

Media/Files

repro.zip

Additional context

No response