TinaCMS - Squash schema mismatches

TL;DR

tinacms build conflates two jobs: local codegen, and an instantaneous deploy gate that compares the local schema against TinaCloud's eventually-consistent backend. The backend only updates after a push triggers an async re-index, so the gate routinely false-fails - the recurring schema-mismatch reports (ERR_CLOUD_CHECK_FAILED).

This Epic separates "make artifacts" from "reconcile with the backend," across @tinacms/cli and TinaCloud.

Target command surface

tinacms dev     -c "next dev"     # codegen + local server + framework dev
tinacms build                     # pure codegen, offline-safe
tinacms publish -c "next build"   # codegen + framework build + wait-for-convergence gate

User flow becomes edit -> push -> wait for green. Removes the tinacms dev lock-dance and --skip-cloud-checks.