Pure formatting pass from `cargo fmt --all`. No logic changes. Separating
this out so the 1.9 release feature commits that follow show only their
intentional edits.
- tonic-reflection for gRPC service discovery
- /schema/workflow.json (JSON Schema from schemars derives)
- /schema/workflow.yaml (same schema in YAML)
- /schema/workflow.proto (raw proto file)
- Multi-stage alpine Dockerfile with all executor features
- Comprehensive configuration reference (wfe-server/README.md)
- Release script (scripts/release.sh)
- Bumped to 1.8.1
