meta: add ric-oliv to CODEOWNERS

[jamescrosswell]

Adds @ric-oliv as a code owner alongside @jamescrosswell, so they're automatically requested for review on all PRs.

#skip-changelog

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.76%. Comparing base (cba98c9) to head (f8660af).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5584   +/-   ##
=======================================
  Coverage   74.76%   74.76%           
=======================================
  Files         515      515           
  Lines       18963    18963           
  Branches     3694     3694           
=======================================
  Hits        14177    14177           
  Misses       3908     3908           
  Partials      878      878           

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