Prepare v2.1.4 release

[HadenSmith]

Prepare v2.1.4 release

Summary

• Updates RMC.Numerics package metadata to v2.1.4, including Version, AssemblyVersion, package release notes, citation metadata, CodeMeta metadata, and the next snapshot workflow version.
• Sets the expected public release outcome to RMC.Numerics 2.1.4.
• Advances snapshot builds to 2.1.5.

Summary

• Adds non-throwing univariate distribution factory creation.
• Preserves valid zero-inflated mixture weights.
• Hardens Box-Cox and Yeo-Johnson fitting and inversion against invalid candidates.
• Enforces ascending empirical distribution ordinates.
• Adds regression coverage for the factory, mixture, empirical distribution, Box-Cox, Yeo-Johnson, and YeoJohnsonLink behavior.

Commits Since v2.1.3 / PR #143

• 5c7b1a1 Add non-throwing distribution factory creation
• 7f8c652 Preserve valid zero-inflated mixture weights
• 5a4d677 Making Yoe-Johnson and Box-Cox more robust to failures. Improved empirical dist validation.
• adbc873 Enforce ascending empirical ordinates
• 8286646 Prepare v2.1.4 release

Validation

• dotnet restore
• dotnet build Numerics/Numerics.csproj -c Release /p:Version=2.1.4
• dotnet test -c Release with VSTEST_CONNECTION_TIMEOUT=600
• dotnet pack Numerics/Numerics.csproj -c Release /p:Version=2.1.4 --no-build -o ./packages
• Inspect the .nupkg metadata and confirm version 2.1.4 and release notes are correct.