refactor!: rename the project from Monitor to MoShiro [CI]

Namespaces, assemblies, solution, binaries, images, systemd units, config paths, environment variables, protocol methods and the Linux user are all renamed. Breaking: existing databases, node identities and installed units must be recreated.

backend/src/MoShiro.Backend.Application/Nodes/NodeInfo.cs

@@ -0,0 +1,34 @@
+namespace MoShiro.Backend.Application;
+
+/// <summary>
+/// 一个节点（Agent 或 Probe）用来展示的信息：系统和架构、国家、运营商，以及它自己上报的构建信息（版本、tag、提交、构建时间）。
+/// <b>不含任何 IP 地址、城市、ASN 或经纬度</b>——这些只在查询的那一刻用到，不留下，也不对外。
+/// </summary>
+public sealed record NodeInfo(
+    string NodeId,
+    string Kind,
+    string? Os,
+    string? OsName,
+    string? Arch,
+    string? Country,
+    string? IspKey,
+    string? IspName,
+    string? Version = null,
+    string? Tag = null,
+    string? Commit = null,
+    string? BuiltAt = null);
+
+/// <summary>
+/// 存起来的完整记录（只给 Backend 内部用）：多了一个「查询用的主机」，用来判断地址变了没有、要不要重新查。
+/// 这个字段不会出现在任何对外的接口里。
+/// </summary>
+public sealed record NodeMeta(NodeInfo Info, string? GeoHost, long GeoAtMs, long UpdatedAtMs);
+
+public static class NodeKinds
+{
+    public const string Agent = "agent";
+    public const string Probe = "probe";
+}
+
+/// <summary>IP 归属查询的结果（只取需要的几项）。</summary>
+public sealed record GeoInfo(string? Country, int? Asn, string? Organization, bool IsPrivate);