Use release tags for Docker image publishing and add Docker skip markers

[mfa777]

This pull request updates the release and Docker image publishing workflows to make Docker builds more flexible and easier to control. The main improvements are the introduction of a reusable workflow for building and pushing Docker images, support for skipping Docker builds via commit message markers, and improved documentation describing the new process.

Workflow improvements and flexibility:

• Refactored .github/workflows/build-and-push.yml to be a reusable workflow that accepts release_tag, source_ref, and skip_docker as inputs, and uses release_tag for Docker image tags instead of the commit SHA. It now conditionally runs based on the skip_docker flag. [1] [2] [3]

Conditional Docker publishing:

• Updated .github/workflows/release-on-master-merge.yml to detect #skip-docker or :noimage markers in the merge commit message and set the skip_docker output accordingly, allowing releases to skip Docker image builds and pushes when needed. [1] [2]
• Modified the release workflow to call the new reusable Docker build workflow, passing the relevant inputs and handling the skip logic. The release notes now indicate whether Docker images were published or skipped. [1] [2]

Documentation updates:

• Updated docs/BUILD_AND_PUSH.md to describe the new workflow structure, the Docker skip mechanism, and how to customize or troubleshoot the release process. [1] [2]

[Copilot]

Pull request overview

This PR refactors the GitHub Actions release pipeline so Docker images are built/published from a reusable workflow using the generated semver release tag (instead of the commit SHA), with an opt-out mechanism via merge-commit markers.

Changes:

• Converted build-and-push.yml into a workflow_call reusable workflow that tags images with the generated release_tag and can be skipped via a boolean input.
• Updated the release workflow to detect #skip-docker / :noimage in the merge commit message, conditionally invoke the reusable Docker workflow, and annotate release metadata with whether images were published or skipped.
• Updated documentation to reflect the new release/tagging and Docker publishing flow.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
docs/BUILD_AND_PUSH.md	Documents the updated release-tag-based Docker publishing flow and skip markers.
.github/workflows/release-on-master-merge.yml	Adds skip-marker detection and calls the reusable build workflow; release notes reflect publish vs skip.
.github/workflows/build-and-push.yml	Reworked into a reusable workflow with inputs for release_tag, source_ref, and skip_docker; tags images using release_tag.

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