codecompanion.nvim v19 renamed `strategies` to `interactions`
(olimorris/codecompanion.nvim#2485). The nvf module still generated
the deprecated `strategies` key, which triggers codecompanion's
backwards-compat migration shim. That shim replaces any user-provided
`interactions` table with `defaults + strategies`, silently
discarding user overrides like `interactions.chat.adapter`.
Rename the option tree so the generated Lua uses the current
`interactions` key and the migration shim is never triggered.