fix: change ollama output name to 'meta'

[Rusteam]

Currently it fails with hayhooks with:

llm-rest-api   | pydantic_core._pydantic_core.ValidationError: 1 validation error for Pipe_ragRunResponse
llm-rest-api   | llm.metadata
llm-rest-api   |   Field required [type=missing, input_value={'replies': ['\nTo answer..._duration': 844273000}]}, input_type=dict]
llm-rest-api   |     For further information visit https://errors.pydantic.dev/2.6/v/missing

because in output types it mentions metadata not meta. This fixed it

[CLAassistant]

All committers have signed the CLA.

[anakin87]

@Rusteam thanks for this fix!

I'll merge this PR as soon as the CLA is signed.

[Rusteam]

singed the CLA, although I felt it requires too many permissions

[anakin87]

Thanks. Released a new version: https://pypi.org/project/ollama-haystack/0.0.6/