v0.1.0

v0.1.0 — opens the v0.1 release line of the Evidence Suite developer surface. Rust CLI scaffold for init / append / sign / verify / redact / export operations against bundle directories. Stable per ROADMAP.md §4: bundle file layout, verification semantics, signature scheme. Explicitly experimental per VERSIONING.md §6: CLI argument shapes and output formats — no stability guarantee through v0.1.x. Implementation work and macOS/Linux release builds planned for the v0.1 release line — tracked in the v0.1 milestone. See REFERENCE-ARCHITECTURE.md §5.5.