fix(math): fix factorial signature and add missing constants/functions

[github-actions]

🤖 This is an automated pull request from Repo Assist.

Problem

Two issues with Fable.Python.Math bindings:

1. Bug: math.factorial has wrong signature for Python 3.12+
   The binding declared abstract factorial: x: float -> float, but Python 3.12 removed float support — math.factorial(5.0) now raises TypeError: 'float' object cannot be interpreted as an integer. Since pyproject.toml requires python >= 3.12, this binding (and its test) was broken.

2. Missing constants and functions
   The math module was missing many commonly-used members: the five constants (pi, e, tau, inf, nan), and over a dozen functions (sqrt, degrees, radians, trunc, hypot, fsum, isqrt, prod, perm, hyperbolic functions, and special functions).

Fix

• Changed factorial signature to int -> int and updated the test to pass integer literals.
• Added all five math constants (pi, e, tau, inf, nan).
• Added missing functions: sqrt, degrees, radians, trunc, hypot, fsum, isqrt, prod, perm, acosh, asinh, atanh, cosh, sinh, tanh, erf, erfc, gamma, lgamma.
• Fixed math.dist to accept float[] arrays (the Python function takes two point sequences, not two scalars).
• Reorganised the IExports interface with section comments matching the Python docs structure.
• Added tests for all new members.

Trade-offs

• This is additive (no existing signatures removed). The only breaking change is factorial: float -> float → factorial: int -> int, which aligns with the Python 3.12 API. Any F# code passing floats to factorial was already broken at runtime.
• math.dist signature changed from float -> float -> float to float[] -> float[] -> float. The old curried scalar version was incorrect (Python's dist takes two sequences of coordinates, not two scalars).

Checklist

• Fixed math.factorial signature (float -> float → int -> int)
• Added constants: pi, e, tau, inf, nan
• Added functions: sqrt, degrees, radians, trunc, hypot, fsum, isqrt, prod, perm, all hyperbolic and special functions
• Fixed math.dist signature
• Updated and extended TestMath.fs
• Updated CHANGELOG.md

Note

🔒 Integrity filter blocked 10 items

The following items were blocked because they don't meet the GitHub integrity level.

• How does it generate the python source from AST? #5 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• Roadmap #15 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• Create Pyi parser #22 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• string format specifier '{i:X4}' not working #36 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• Support for Attributes? #48 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• Pandas binding #65 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• typeshed: generate bindings automatically ~ python glutinum? #115 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• auto pip installation of dependencies during compilation of scripts #117 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• allow TextIOWrapper to be enumerated #131 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".
• support for asynchronous context managers #134 list_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".

To allow these resources, lower min-integrity in your GitHub frontmatter:

tools:
  github:
    min-integrity: approved  # merged | approved | unapproved | none

Generated by Repo Assist · ● 2M · ◷