Skip product releases for docs-only commits

[kl3inIT]

Problem

The independent docs work exposed a remaining coupling: every green docs-only main commit copied all six product image manifests and automatically redeployed the product, even though no product image input changed.

Change

• treat an empty product-image change set as an explicit no-op
• skip manifest carry-forward and release verification for no-op runs
• choose previous bases only from runs whose immutable image-set job actually succeeded
• make automatic and manual product deploy validation require that same release job, so a successful no-op workflow can never reach SSH
• record the verified product deployment and docs-absent boundary

Verification

• actionlint 1.7.12
• documentation operating-model check (284 Markdown, 8 mirrored domain pairs)
• git diff --check

This does not dispatch a docs deployment or change DNS/TLS/Nginx Proxy Manager.

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Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 820dda1b-a71d-4d3f-b925-df4e900fa707

📥 Commits

Reviewing files that changed from the base of the PR and between c5d4797 and 49d4e0e.

⛔ Files ignored due to path filters (3)

• docs/increments/active/2026-07-28-public-docs-portal/plan.md is excluded by !docs/**
• docs/increments/active/2026-07-28-public-docs-portal/verification.md is excluded by !docs/**
• docs/runbooks/public-docs-deployment.md is excluded by !docs/**

📒 Files selected for processing (3)

• .github/workflows/build-images.yml
• .github/workflows/deploy-production.yml
• ARCHITECTURE.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/product-release-noop-for-docs

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