Detect and clean stale CMake caches in bootstrap

[stuartc]

Description

Add automatic detection of stale CMake build caches that occur when:

• Using git worktrees with copied dependencies
• Moving or renaming the repository directory
• Restoring from backup at a different path
• Syncing code between machines with different paths

The detection scans all CMakeCache.txt files in dependencies and compares cached paths with current paths. When mismatches are found, it cleans CMake build directories, compiled native libraries, and rebar3 build artifacts to prevent compilation errors.

This particularly resolves crc32cer compilation failures but works generically for any CMake-based dependency regardless of build directory naming convention.

AI Usage

Please disclose how you've used AI in this work (it's cool, we just want to know!):

• Code generation (copilot but not intellisense)
• Learning or fact checking
• Strategy / design
• Optimisation / refactoring
• Translation / spellchecking / doc gen
• Other
• I have not used AI

You can read more details in our Responsible AI Policy

Pre-submission checklist

• I have performed a self-review of my code.
• I have implemented and tested all related authorization policies. (e.g., :owner, :admin, :editor, :viewer)
• I have updated the changelog.
• I have ticked a box in "AI usage" in this PR

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.41%. Comparing base (b4fa0e1) to head (470db7e).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3762   +/-   ##
=======================================
  Coverage   88.41%   88.41%           
=======================================
  Files         414      414           
  Lines       17895    17895           
=======================================
  Hits        15821    15821           
  Misses       2074     2074           

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