[log] Add debug logging to artifact manager, update command, and MCP config utils

[github-actions]

Adds meaningful debug log statements to 5 Go files in pkg/ that had minimal logging coverage.

Changes

• pkg/workflow/artifact_manager.go: Log when NewArtifactManager() creates a new manager instance
• pkg/workflow/create_code_scanning_alert.go: Log custom driver name, target repo, allowed repos count, and full parsed config summary in parseCodeScanningAlertsConfig
• pkg/cli/logs_utils.go: Log count of discovered .lock.yml files and each extracted workflow name in getAgenticWorkflowNames
• pkg/workflow/mcp_config_utils.go: Log the boolean decision result of shouldRewriteLocalhostToDocker to aid sandbox connectivity debugging
• pkg/cli/update_command.go: Log before UpdateActions and UpdateActionsInWorkflowFiles calls with relevant flags, plus completion status in RunUpdateWorkflows

Test plan

• make build passes with no compilation errors
• Enable DEBUG=* and run gh aw compile to verify logs appear at expected callsites
• Run gh aw update with DEBUG=* to verify update-phase logs appear in sequence

Generated by Go Logger Enhancement · ◷

Warning

⚠️ Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

• proxy.golang.org

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "proxy.golang.org"

See Network Configuration for more information.

• expires on Mar 11, 2026, 8:32 PM UTC