v0.1.0

v0.1.0 — protocol crate stack scaffold

5 crates ship in this tag:
- animus-plugin-protocol — wire types (RpcRequest/Response, PluginInfo, PluginManifest, HealthCheckResult)
- animus-subject-protocol — SubjectBackend trait + normalized Subject schema for backends like Linear, Jira, GitHub Issues
- animus-provider-protocol — ProviderBackend trait + AgentRunRequest/AgentRunResponse for LLM providers
- animus-plugin-runtime — slim stdio JSON-RPC loop, exposes subject_backend_main + provider_main
- animus-session-backend — CLI-subprocess session management lifted from llm-cli-wrapper

This tag is consumed by 7 plugin repos (animus-subject-linear, animus-plugin-template, and 5 provider repos) via cargo git deps. Plugins should pin tag = "v0.1.0" rather than branch = "main" to insulate from breaking changes on main.

CI green on commit d6b63f1.