[wip] artifacts

[kumare3]

Artifacts

Adds support for passing flyte.remote.Artifact instances as task inputs. When an
Artifact (or a list containing artifacts) is passed to a local run, it is unwrapped
into its underlying pb2["data"] payload before submission.

Recent changes

• Merged latest main into the branch.
• Artifact unwrapping now applies to positional args as well as keyword args
  (previously only kwargs were unwrapped).
• Extracted the conversion into module-level _unwrap_artifacts /
  _unwrap_artifact_value helpers in flyte/_run.py.
• Added unit tests in tests/test_run_artifact_unwrap.py covering single artifacts,
  lists of artifacts, mixed/plain values, and positional + keyword combinations.

🤖 Generated with Claude Code

[wild-endeavor]

should we add modelcard and user specified metadata?

artifacts.Metadata(
    name="my_artifact", version="1.0", description="An example artifact created in create_artifact task",
    card=ModelCard("single.html"),
    custom={"a": "one", "b": {"c": 3}}
)

[kumare3]

should we add modelcard and user specified metadata?

artifacts.Metadata(
    name="my_artifact", version="1.0", description="An example artifact created in create_artifact task",
    card=ModelCard("single.html"),
    custom={"a": "one", "b": {"c": 3}}
)

Yes I want to, i was thinking we make ModelMetadata and DataMetadata?
Question is, how do we upload the modelcard, do we upload are part of artifact creation or should we do it at transform time, i think before right?