refactor!: rename the project from Monitor to MoShiro

Namespaces, assemblies, projects and directories, the solution, binaries,
images, systemd units, config paths, environment variables, protocol method
names, the media type and the raw chunk magic all move to MoShiro/moshiro.
Existing data and deployments are not compatible and must be recreated.
Also fix the architecture tests after the solution layout change and make
the update tests independent of their order.

docs/fleet/update.md

@@ -1,6 +1,6 @@
 # Fleet：通用更新（Fleet.Update / fleet-updater）
 
-> **实现状态**：容器节点（Agent、Probe）的更新已经实现，见 [deployment.md](../deployment.md) 的「容器节点的更新」：同样的信任模型（离线发布密钥签名、本机配置公钥和仓库、`seq` 防重放、面板只通知和请求），清单里是镜像 digest，更新器是宿主机上的 `monitor-update`。本文下面描述的纯二进制方案（`Fleet.Update`、`fleet-updater`、`fleet-release`、健康信标）还没有实现。
+> **实现状态**：容器节点（Agent、Probe）的更新已经实现，见 [deployment.md](../deployment.md) 的「容器节点的更新」：同样的信任模型（离线发布密钥签名、本机配置公钥和仓库、`seq` 防重放、面板只通知和请求），清单里是镜像 digest，更新器是宿主机上的 `moshiro-update`。本文下面描述的纯二进制方案（`Fleet.Update`、`fleet-updater`、`fleet-release`、健康信标）还没有实现。
 
 ## 1. 原则
 
@@ -30,15 +30,15 @@
   "check_interval_s": 3600,
   "apps": [
     {
-      "id": "monitor-agent",
-      "sources": ["https://panel.example.com/fleet/releases", "https://github.com/org/monitor/releases/download"],
+      "id": "moshiro-agent",
+      "sources": ["https://panel.example.com/fleet/releases", "https://github.com/org/moshiro/releases/download"],
       "channel": "stable",
       "policy": "notify",
       "rid": "linux-x64",
-      "install_dir": "/opt/monitor-agent",
+      "install_dir": "/opt/moshiro-agent",
       "keep_versions": 2,
-      "service": { "kind": "systemd", "name": "monitor-agent" },
-      "health": { "kind": "beacon", "path": "/run/fleet/monitor-agent.beacon", "timeout_s": 60 }
+      "service": { "kind": "systemd", "name": "moshiro-agent" },
+      "health": { "kind": "beacon", "path": "/run/fleet/moshiro-agent.beacon", "timeout_s": 60 }
     }
   ]
 }
@@ -53,16 +53,16 @@
 ```json
 {
   "schema": 1,
-  "app": "monitor-agent",
+  "app": "moshiro-agent",
   "channel": "stable",
   "version": "0.4.2",
   "released_at": "2026-10-01T00:00:00Z",
   "min_from": "0.3.0",
   "artifacts": [
-    { "rid": "linux-x64",   "url": "monitor-agent-0.4.2-linux-x64.tar.gz",   "sha256": "…", "size": 4120334 },
-    { "rid": "linux-arm64", "url": "monitor-agent-0.4.2-linux-arm64.tar.gz", "sha256": "…", "size": 3987112 },
-    { "rid": "linux-musl-arm64", "url": "monitor-agent-0.4.2-linux-musl-arm64.tar.gz", "sha256": "…", "size": 3990021 },
-    { "rid": "win-x64",     "url": "monitor-agent-0.4.2-win-x64.zip",        "sha256": "…", "size": 4455010 }
+    { "rid": "linux-x64",   "url": "moshiro-agent-0.4.2-linux-x64.tar.gz",   "sha256": "…", "size": 4120334 },
+    { "rid": "linux-arm64", "url": "moshiro-agent-0.4.2-linux-arm64.tar.gz", "sha256": "…", "size": 3987112 },
+    { "rid": "linux-musl-arm64", "url": "moshiro-agent-0.4.2-linux-musl-arm64.tar.gz", "sha256": "…", "size": 3990021 },
+    { "rid": "win-x64",     "url": "moshiro-agent-0.4.2-win-x64.zip",        "sha256": "…", "size": 4455010 }
   ],
   "notes_url": "https://…/CHANGELOG#0.4.2",
   "key_id": "rel-2026a",