fix(release): use the job token and Node 24 for docs - #498

The v0.4.0-alpha.1 deployment failed in the publishing job during checkout. Its custom GH_TOKEN failed authentication, while the built-in job token succeeded in validation and all four executable jobs. Remove the custom token override and fallback step so checkout uses its default token with the existing contents: read permission.

The docs deployment also failed because Hugo 0.169 invokes PostCSS with node --permission, which Node 20 rejects. Use Node 24, matching mise.toml, and update the docs prerequisite.

Validation:

• Reproduced the full production Hugo build failure under Node 20.20.2. The identical Hugo 0.169 build passes under Node 24.14.1, producing 157 pages.
• Release checkout configuration check fails before the fix and passes afterward.
• Actionlint schema/expression validation and git diff --check pass. Existing ShellCheck warnings in unchanged scripts remain.
• ./build.sh --target Lint passes.
• ./build.sh --target Test --configuration Release passes, including unit/BDD suites and cold package lifecycle checks. Local execution uses a physical temporary directory and the installed PowerShell binary, matching CI requirements. Plain dotnet test cannot run this repository's Microsoft.Testing.Platform suites under .NET 10.

Failed runs: release, docs.

After merge, recovery requires a new Deployment dispatch on the corrected main branch for 0.4.0-alpha.1. Rerunning the old tag run would reuse the broken workflow. No tag changes are required. Publication has not been retried.