Some Client methods drop explicitly defined simvue args #1017

Description of Bug

simvue/api/objects/artifact/fetch.py:168 (Artifact.get) and :331 (Artifact.from_run) yield:

But SimvueObject.__init__ unconditionally calls SimvueConfiguration.fetch() at construction — so every yielded artifact re-derives config from the process env and raises.

Note the contrast: the inherited SimvueObject.get does forward server_url/server_token into the objects it yields — that's why runs/folders/metrics all work and only artifacts fail.

The hand-written Artifact.get/from_run just missed it. Client.list_artifacts (client.py:512) forwards credentials for the HTTP list call, but they're lost on the yielded objects.

Client.get_folder → get_folder_from_path (api/objects/folder.py) → Folder.get(filters=[...], count=1) also drops server_url/server_token.

I haven't checked all files, these are just the ones I happened to stumble across. Need to go through and check that each object passes through url and token correctly