chore(txe): raise TXE bundle size guard 14 -> 15 MiB after public-v5-next merge

The public-v5-next merge adds the interactive-handshake support and an
enlarged HandshakeRegistry contract chunk, pushing the bundled TXE size to
~14.01 MiB and tripping the total-size guard (14 MiB). No individual chunk
exceeded its cap; only the aggregate limit needed bumping.

Author: AztecBot

yarn-project/txe/esbuild/plugins/size_guard.mjs

@@ -11,6 +11,9 @@
 
 // Bump log:
 // - 2026-05-27: initial limits.
+// - 2026-07-08: total 14 -> 15 MiB. Merging public-v5-next into v5-next pulled in the interactive-handshake
+//   support (recipient- and sender-side) and the enlarged HandshakeRegistry contract chunk, pushing the TXE
+//   bundle to ~14.01 MiB. No individual chunk exceeded its cap.
 export const sizeLimits = [
   // Shared chunks emitted by code-splitting; carry the simulator + PXE + world-state graph.
   // Spikes here usually mean a heavy dep crept into the eager import path.
@@ -22,7 +25,7 @@ export const sizeLimits = [
   { pattern: /^dest\/bin\/index\.js$/, maxKB: 8, description: 'CLI entrypoint stub' },
 ];
 
-export const totalLimitMiB = 14;
+export const totalLimitMiB = 15;
 
 /**
  * Validates a built esbuild `metafile` against the configured limits. Logs all violations then