CreateOrderV2Request docstring references nonexistent FixedPointDollars Python type #339

Problem

The CreateOrderV2Request docstring introduces V2's pricing convention as price: FixedPointDollars. There is no Python type named FixedPointDollars exported by the SDK — kalshi/types.py exposes DollarDecimal, FixedPointCount, MultiplierDecimal, NullableList, UnixSecondsTimestamp, and StrictInt. The actual annotation a few lines down is DollarDecimal. (FixedPointDollars is the OpenAPI wire schema name, but it never names a Python alias — and the comment in markets.py has the same drift.)

Readers chase a phantom alias when reading the docstring; mkdocs autodoc surfaces this prose on the published reference site.

Evidence

• kalshi/models/orders.py:467 — docstring claim

- Price is a single ``price: FixedPointDollars`` field rather than the
  paired ``yes_price`` / ``no_price`` from V1.

• kalshi/models/orders.py:475 — actual annotation

price: DollarDecimal

• kalshi/models/markets.py:35 — same drift

# Price fields (FixedPointDollars)

• kalshi/types.py:50 — DollarDecimal is the real alias; no FixedPointDollars.

Suggested fix

Replace FixedPointDollars with DollarDecimal in the docstring at kalshi/models/orders.py:467. Update the comment at kalshi/models/markets.py:35 to # Price fields (DollarDecimal — wire shape: FixedPointDollars string) so the wire schema name is preserved but the Python type is unambiguous. (Other occurrences in docs/types.md, docs/resources/index.md, docs/migration.md, and the test files refer to the wire schema name and are correct as-is.)

Source

Round-3 independent audit (reviewer: models_contracts).