Add RC versions to nightly releases

[Trawis]

Summary

• Give each nightly build a version derived from Helpers.Version and the workflow run number.

Changes

• Generate prerelease versions such as 5.2.6-rc123.
• Apply the version to build metadata, archive and artifact names, Git tags, and GitHub prereleases.
• Target the checked-out develop commit and prevent nightly builds from replacing the latest stable release.

Documentation

• README.md updated if needed
• CHANGELOG.md updated if needed
• FEATURES.md updated if needed

Validation

• dotnet format --verify-no-changes
• dotnet build
• dotnet test
• Smoke/manual check where practical
• Implementation rechecked against requirements

The Release build completed with three existing compiler warnings and no errors. Version extraction produced 5.2.6-rc123; the compiled product metadata starts with that version. The solution contains no test projects producing test output. Workflow lint was not run because actionlint is not installed locally.

Branching / Merge Safety

• Branch follows feature/*, release/*, or hotfix/*
• PR targets the correct Git Flow branch
• No auto-merge requested/performed

Notes / Risks

• RC numbers use GitHub's monotonically increasing workflow run number, so they do not restart when Helpers.Version changes.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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