Throw ArgumentException from Clamp when min is greater than max

[matt-edmondson]

Fixes #117

What changed

• The instance Clamp<TNumber>(min, max) now throws ArgumentException (with paramName min) when min > max. It checks after converting both bounds, and the message follows the BCL's '{min}' cannot be greater than {max}.
• The static INumber<T>.Clamp delegates to the instance method, so it gets the same check. Both carry <exception> docs.
• Equal bounds are still accepted.

Before this change, PreciseNumber.Clamp(2, 3, 1) returned 3. Math.Clamp, decimal.Clamp and the default INumber<T>.Clamp all throw for an inverted range.

Tests

• TestClampThrowsWhenMinIsGreaterThanMax covers a value inside the inverted range and a value outside it, through both the static and the instance overload.
• TestClampAcceptsEqualBounds guards the min == max edge.

Verification

• With the fix reverted, TestClampThrowsWhenMinIsGreaterThanMax fails. With the fix, it passes.
• The full dotnet test suite passes: 387/387.

🤖 Generated with Claude Code

https://claude.ai/code/session_01M4xENzmZT4DZE8d5Hu6kEN

---

Generated by Claude Code

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud