feat: add git-sha parameter to support deploying from specific commits

[maoanran]

Add optional git-sha input parameter to deploy workflows to enable building and deploying from specific commit SHAs. This enables PR comment-based deployments where a specific commit needs to be built.

Changes

• Add git-sha input to component-build.yml
• Pass SHA through setup job outputs for consistency across all jobs
• Update all checkouts and image tags to use the provided SHA
• Add git-sha input to deploy-generic.yml, deploy-generic-v2.yml, deploy-kotlin.yml, deploy-python.yml

Usage

Calling workflows can now pass a specific SHA to build:

jobs:
  get-pr-sha:
    steps:
      - checkout PR branch
      - id: get-sha
        run: echo "sha=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
    outputs:
      sha: ${{ steps.get-sha.outputs.sha }}
  
  deploy:
    uses: monta-app/github-workflows/.github/workflows/deploy-generic.yml@main
    with:
      git-sha: ${{ needs.get-pr-sha.outputs.sha }}
      # ... other params

Backwards compatible

The git-sha parameter is optional and defaults to github.sha, so existing workflows continue to work without changes.

[Copilot]

Pull request overview

This PR adds support for building and deploying from specific commit SHAs by introducing an optional git-sha parameter to the build and deployment workflows. This enables PR comment-based deployments and other scenarios where a specific commit needs to be built instead of the default triggering commit.

Changes:

• Added optional git-sha input parameter to all deployment workflows (deploy-generic, deploy-generic-v2, deploy-kotlin, deploy-python)
• Updated component-build.yml to accept and use git-sha for checkouts, image tagging, and outputs
• Changed Docker metadata action from automatic SHA detection to explicit raw value to ensure consistency

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/workflows/component-build.yml	Added git-sha input parameter; updated all checkouts, image tags, and outputs to use the provided SHA or default to github.sha
.github/workflows/deploy-generic.yml	Added git-sha input parameter and passed it through to component-build workflow
.github/workflows/deploy-generic-v2.yml	Added git-sha input parameter and passed it through to component-build workflow
.github/workflows/deploy-kotlin.yml	Added git-sha input parameter and passed it through to component-build workflow
.github/workflows/deploy-python.yml	Added git-sha input parameter and passed it through to component-build workflow

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