[Kayvan-Zahiri]

json_to_convex() rejects Python int values even though they are part of its JsonValue input type. Whole-number JSON literals therefore raise ValueError, including when nested in a successful ConvexHttpClient response.

Decode untagged integer literals as Float64 values, matching Convex's JSON number representation. Keep the existing boolean branch first and preserve the separate tagged $integer → ConvexInt64 behavior. This also accepts exactly representable Float64 values above 2^53 on decode; it does not change outgoing Python integer coercion rules.

Adds 18 offline regression/control cases: scalar and nested integer literals, all three public HTTP methods with real Requests JSON decoding, booleans, other primitives, and tagged Int64. Requests are intercepted before network I/O.

Validation:

• Before: 12 failures and 6 passing controls in the new tests.
• After: 22 Python tests and doctests pass (pytest tests python/convex python/_convex).
• Native extension built from this checkout with maturin and the already-installed nightly-2026-09-01 toolchain (the repository pins nightly-2026-06-28).
• Changed-file Ruff formatting, strict mypy, and git diff --check pass.
• Broader Python mypy retains two no-any-return findings in python/convex/__init__.py, reproduced with the original decoder.

No live deployment was called. The WebSocket client's Rust conversion path is unchanged.