v0.9.1

release(codex): v0.9.1 — Address Book width/display fixes

Fix long Ouronet addresses bulging past the page width in the Address
Book: the entry-list grid now uses grid-template-columns: minmax(0, 1fr)
so an unbreakable address can no longer expand a card (and the page) —
long rows truncate instead of overflowing. Covers all three sub-tabs
(Ouronet, StoaChain, StoicTags) via the one shared grid.

• Ouronet entries render via OuronetAddressHighlight (same component as
  the Ouronet Accounts tab): blue first-3/last-3 highlight, fills width,
  centered start … end middle-truncation.
• MiddleEllipsis + OuronetAddressHighlight render directly in final form
  (hidden until measured width settles) — no "retract" flash.
• Remove the erroneous KADENA:MAINNET chain chip (StoaChain is
  mainnet-only).

Bump codex + codex-ouronet to 0.9.1; README/CHANGELOG doc gates updated.
codex-only publish (arweave-core unchanged).

Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com