Add serena container to predownload list when enabled

[Copilot]

The serena tool's container image was not being predownloaded, causing workflow startup delays.

Changes

• Modified pkg/workflow/docker.go: Extended collectDockerImages() to detect serena tool configuration

  • Only includes container when serena is in docker mode (default)
  • Skips when mode: local is set (uses uvx instead of container)
  • Leverages selectSerenaContainer() for language-specific container selection
  • Appends :latest tag consistent with MCP config renderer

• Added test coverage: Three scenarios in docker_predownload_test.go

  • Serena docker mode → container included
  • Serena local mode → container excluded
  • Serena + GitHub tool → both containers included

Example

Before this change, workflows using serena would pull the container on-demand:

# No serena container in predownload step
- name: Download container images
  run: bash /opt/gh-aw/actions/download_docker_images.sh ghcr.io/github/gh-aw-mcpg:v0.0.99

After:

# Serena container predownloaded alongside other images
- name: Download container images
  run: bash /opt/gh-aw/actions/download_docker_images.sh ghcr.io/github/gh-aw-mcpg:v0.0.99 ghcr.io/github/serena-mcp-server:latest

Original prompt

When the serena tool is enabled, the compiler needs to add the serena container image to the list of image container to predownload.

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[Copilot]

Pull request overview

This PR adds serena MCP container image predownloading support to reduce workflow startup delays. When serena is configured in docker mode (the default), its container is now included in the initial image download step alongside other required containers.

Changes:

• Extended collectDockerImages() in pkg/workflow/docker.go to detect and include serena container when in docker mode (skips local mode which uses uvx instead)
• Added comprehensive test coverage for serena predownload scenarios including docker mode, local mode, and multi-tool combinations
• Updated all workflow lock files that use serena to include the container in their predownload steps

Reviewed changes

Copilot reviewed 21 out of 21 changed files in this pull request and generated no comments.

File	Description
pkg/workflow/docker.go	Added serena container detection logic to collectDockerImages() with proper mode checking
pkg/workflow/docker_predownload_test.go	Added three test cases covering serena docker mode, local mode, and combination scenarios
.github/workflows/*.lock.yml (19 files)	Updated generated workflow files to include serena container in predownload step

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