What problems was I solving

The NumberString codec was exported from the shared codecs barrel but was never imported or used anywhere in the monorepo, leaving dead code on the public surface of the package.

What user-facing changes did I ship

There are no user-facing changes. This is an internal cleanup only.

How I implemented it

Deleted architect/codecs/main/number-string.ts and removed the corresponding export * from './number-string'; line from architect/codecs/main/index.ts. A repo-wide search confirmed no existing call-sites, tests, or imports of NumberString.

Description for the changelog

Removed the unused NumberString codec and its barrel export from the codecs package. This dead-code cleanup has no behavior or API impact because the symbol had no consumers anywhere in the monorepo.