Prepare Agentstration 0.1.0-alpha.1

[gbaudrit-codex]

Summary

• centralize the Agentstration product version as 0.1.0-alpha.1 without changing the autonomous AEP package version
• add a fail-closed tag release workflow that validates main, rebuilds and retests Agentstration and AEP, packages the server and Workplace, generates SHA-256 checksums, and creates a GitHub prerelease
• publish the server/Console image to Docker Hub as agentstration/agentstration:0.1.0-alpha.1 and :alpha for linux/amd64 and linux/arm64, with provenance, SBOM, and recorded manifest digest; no latest tag is emitted
• add version-specific release notes and expose them in the documentation portal
• document the product and container release process while preserving the README and Apache 2.0 licensing changes from Refresh project README and adopt Apache 2.0 #47

Required repository configuration

Create the agentstration/agentstration Docker Hub repository and configure GitHub Actions secrets DOCKERHUB_USERNAME and DOCKERHUB_TOKEN. The token must be a scoped Docker Hub access token with write permission; the workflow fails explicitly when either secret is absent.

Release procedure

After this PR is merged and required checks pass, create and push the annotated tag v0.1.0-alpha.1. The workflow rejects a mismatched tag or a commit not contained in main.

Validation

• dotnet restore Agentstration.slnx -p:NuGetAudit=true -p:NuGetAuditMode=all
• dotnet build Agentstration.slnx --configuration Release --no-restore — 0 warnings, 0 errors
• dotnet test Agentstration.slnx --configuration Release --no-build --verbosity minimal — 455 passed, 2 optional real-server integrations skipped, 0 failed
• dotnet build aep/Aep.slnx --configuration Release --no-restore — passed
• dotnet test aep/Aep.slnx --configuration Release --no-build --verbosity minimal — 9 passed, 0 failed
• npm run build from docs/site — passed after the Docker Hub documentation update
• release packaging smoke test for the server and Workplace — both assemblies report 0.1.0-alpha.1, ZIPs and SHA-256 checksums generated
• release workflow YAML parsed successfully; git diff --check passed
• release branch rebased on Refresh project README and adopt Apache 2.0 #47; README.md has no diff against main

The multi-platform push itself runs only for the release tag after the Docker Hub secrets are configured.