Validate logger migration completeness across targeted packages

[Copilot]

DeepReport reported residual log.Print* usage in several library packages, requiring migration to pkg/logger. This PR verifies the current tree state for those paths and confirms the migration is already complete with no remaining production-library violations.

• Issue scope verified

  • Re-checked the reported package set (fileutil, gitutil, semverutil, typeutil, repoutil, envutil, workflow, cli) for stdlib log.Print* usage.
  • Confirmed these packages are using namespaced pkg/logger instances.

• Code delta

  • No source changes were required; the repository already satisfies the logger-migration requirement for production library code.
  • Remaining log.Print* occurrences are confined to logger docs/tests and linter test fixtures, which are expected.

• Representative pattern in current code

  import "github.com/github/gh-aw/pkg/logger"
  
  var semverLog = logger.New("semverutil:semverutil")
  
  func ParseVersion(v string) *SemanticVersion {
      semverLog.Printf("Parsing semantic version: %s", v)
      // ...
  }