fix(datashare python): pydantic deserialization

[ClemDoum]

⚠️ breaks datashare-python's API: activity_defn

Descriptions

Addresses #47 and refactor activity definition using temporal's interceptor builtin mechanism rather than chaining decorators.

By default temporal bypasses deserialization using the data converter when task argument length differ from activity function arg length.
This is typically the case when we introduce def my_activity_fn(arg_1: PydanticBaseModel, *, progress: ProgressRateHandler | None = None) since the progress is injected and not passed as activity argument by the user.

This was the source of many failure to deserialize pydantic objects as BaseModel but as dict instead

Changes

datashare-python

Fixed

• Pydantic argument deserialization due support of positional only args in temporal

Changed

• remove decorator chaining inside activity_defn in favor of temporal interceptor mechanism