POST /economics/pay, /economics/balances and /economics/adjust, thin
forwards like /kits/uses: each body is stamped with its own command and
passed to the plugin, which remembers a payment's key. Nothing is kept here.
The tally's `balance` and the `economics.wiped` event ride the feed like any
frame. Still protocol 14 (D332); one forward test.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY