Proto changes:
* Add `name` to `WorkflowInstance`, `WorkflowSearchResult`,
`RegisteredDefinition`, and `DefinitionSummary` messages.
* Add optional `name` override to `StartWorkflowRequest` and echo the
assigned name back in `StartWorkflowResponse`.
* Document that `GetWorkflowRequest.workflow_id` accepts UUID or
human name.
gRPC handler changes:
* `start_workflow` honors the optional name override and reads the
instance back to return the assigned name to clients.
* `get_workflow` flows through `WorkflowHost::get_workflow`, which
already falls back from UUID to name lookup.
* `stream_logs`, `watch_lifecycle`, and `search_logs` resolve
name-or-UUID up front so the LogStore/lifecycle bus (keyed by
UUID) subscribe to the right instance.
* `register_workflow` propagates the definition's display name into
`RegisteredDefinition.name`.
Crate build changes:
* Enable the full executor feature set on wfe-yaml —
`rustlang,buildkit,containerd,kubernetes,deno` — so the shipped
binary recognizes every step type users can write.
* Dockerfile switched from `rust:alpine` to `rust:1-bookworm` +
`debian:bookworm-slim` runtime. `deno_core` bundles a v8 binary
that only ships glibc; alpine/musl can't link it without building
v8 from source.
