* Shared build and runner for all build,dev,test flows
* Harden managed process lifecycle
* Make build workflows deterministic
* Test build management contracts
* Queue shared generated output work
* Isolate generated inputs for dev servers
* Preserve dev server child failures
* Make generated lock test deterministic
* Keep test navigator configurable
* Block concurrent frontend workflows
* Simplify workflow lock ownership
* Focus workflow locking on managed commands
* Trim workflow lock unit tests
* Consolidate dev server lifecycle handlers
