fix: add InferenceResult, ModelOutput, ModelRepository, FileUploadResult to __all__

[amathxbt]

Bug

Four types are imported at the top level of src/opengradient/__init__.py but are missing from __all__:

• InferenceResult
• ModelOutput
• ModelRepository
• FileUploadResult

# They ARE imported (visible via direct import)
from .types import (
    ...
    FileUploadResult,
    InferenceResult,
    ModelOutput,
    ModelRepository,
    ...
)

# But NOT in __all__ (invisible via wildcard import)
__all__ = [
    "LLM", "Alpha", ...
    # InferenceResult, ModelOutput, ModelRepository, FileUploadResult MISSING
]

Impact

Problem	Description
from opengradient import *	Silently omits these 4 types — wildcard imports break
IDE auto-completion	Types not suggested as publicly exported
Type stubs / docs	Missing from generated __all__-based docs
hasattr(og, "InferenceResult")	Returns True (they ARE importable) — inconsistent with __all__

Note: Direct imports still work (from opengradient import InferenceResult) — this is a __all__ correctness fix.

Fix

Add the four missing types to __all__:

__all__ = [
    "LLM", "Alpha", "ModelHub", "Twins",
    "TEE_LLM", "InferenceMode",
    "InferenceResult",    # added
    "ModelOutput",        # added
    "ModelRepository",    # added
    "FileUploadResult",   # added
    ...
]

[amathxbt]

@adambalogh