fix(async): serialize API aliases in write helpers

[WilliamK112]

create_or_replace_inventory_type currently sends non_serialized and model_property instead of the API's nonSerialized and modelProperty keys, causing OFSC to reject the missing mandatory field. Serialize aliases at the HTTP boundary in the shared async PUT, POST, and PATCH helpers.

The change preserves JSON-mode serialization, omission of None, and false/zero values. Regression tests inspect the actual outgoing bodies across all three helpers and the public inventory-type write method.

Fixes #188.

Validation with Python 3.13:

• All 459 mocked tests pass, with 8 skipped; 13 alias regression cases failed before the fix.
• Full Ruff check, Ruff format check, and diff whitespace checks pass.