docs: reorganize into design, security, api, ops and dev; drop stale designs; refresh the diagrams [CI]

- Group docs by category with an index (docs/README.md); fix every link,
  code comment and the protocol conformance test that read docs/protocol.md.
- access.md and security.md rewritten to what is implemented: removed the
  unadopted member-proof chain, roles and recovery key that do not exist,
  the old implementation order and the budgets; gaps now carry a status.
- enrollment, deployment, api: the install flow is the static, hash-checked
  script with environment variables; no default admin.
- README and architecture: new topology and update-flow diagrams (operator
  passkey, CI signing, registry feed, auth and trust modules).

packaging/compose/agent/compose.yaml

@@ -1,6 +1,6 @@
 # Docker 和 rootless/rootful Podman 共用。配置、身份和缓存保存在命名 volume 中。
 # docker compose up -d / podman compose up -d（Podman 以普通用户执行即可 rootless）。
-# 首次注册、配置导入和自动更新见 docs/deployment.md。
+# 首次注册、配置导入和自动更新见 docs/ops/deployment.md。
 services:
   agent:
     image: ${MOSHIRO_IMAGE:-registry.oeo.one/moshiro/moshiro-agent}:${MOSHIRO_VERSION:-0.1.1}

packaging/compose/probe/compose.yaml

@@ -1,6 +1,6 @@
 # Docker 和 rootless/rootful Podman 共用。配置、身份和缓存保存在命名 volume 中。
 # docker compose up -d / podman compose up -d（Podman 以普通用户执行即可 rootless）。
-# 首次注册、配置导入和自动更新见 docs/deployment.md。
+# 首次注册、配置导入和自动更新见 docs/ops/deployment.md。
 services:
   probe:
     image: ${MOSHIRO_IMAGE:-registry.oeo.one/moshiro/moshiro-probe}:${MOSHIRO_VERSION:-0.1.1}