I need to conduct a comprehensive migration audit of our ebook conversion system as we prepare to replatform from Ruby to Elixir. Please analyze the following two directories:

1. Original Ruby implementation: /Volumes/Storage/belmendo/Projects/elib-a-fuller-explanation/scripts
2. New Ruby implementation: /Volumes/Storage/belmendo/Projects/elib-a-fuller-explanation/lib

For this audit, I need you to:

1. Create an inventory of all Ruby scripts in the /scripts directory, identifying their primary functions, dependencies, and critical workflows they support.

2. Map each Ruby script function to its corresponding refactoring implementation in the /lib directory, noting where the implementation exists and whether it maintains functional parity.

3. Identify any functionality gaps where Ruby script functions have not been migrated to the Elixir codebase, explaining the potential impact on our ebook conversion pipeline.

4. Suggest an implementation approach for any unmigrated functions, considering our new Elixir/OTP architecture with its focus on concurrency, fault tolerance, and supervision trees.

5. Assess whether the migrated functions leverage Elixir's strengths appropriately, particularly in the areas of build pipeline parallellization, error handling, and system observability.

The replatforming strategy emphasizes preserving existing functionality while enhancing build environment management, validation, quality control, auditing, and workflow automation. Your analysis should verify whether we're on track with these objectives.

Please provide your findings as a detailed report with sections for methodology, mapping results, migration gaps, implementation recommendations, and next steps. This audit will inform our remaining development work in the phased implementation plan.