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/shared/MoShiro.Protocol/ProtocolLimits.cs

@@ -0,0 +1,43 @@
+namespace MoShiro.Protocol;
+
+public static class ProtocolVersion
+{
+    public const int Container = 1;
+    public const int Wire = 1;
+}
+
+public static class ProtocolLimits
+{
+    /// <summary>持续任务每 10 秒切一块。</summary>
+    public const int ChunkSeconds = 10;
+
+    /// <summary>单块记录数上限。</summary>
+    public const int MaxRecordsPerChunk = 50_000;
+
+    /// <summary>解压后的块上限（防解压炸弹）。</summary>
+    public const int MaxDecodedChunkBytes = 64 << 20;
+
+    public const int MaxStreamsPerChunk = 16;
+
+    public const int MaxColumnsPerStream = 64;
+
+    /// <summary>每条线路持续任务的总带宽上限（bit/s）。</summary>
+    public const long MaxLineBudgetBitsPerSecond = 100_000;
+}
+
+/// <summary>二进制通道号（0–15 属于 Fleet，MoShiro 从 16 开始）。</summary>
+public static class MoShiroChannels
+{
+    /// <summary>Agent → Backend：RawChunk（发件箱）。</summary>
+    public const byte RawChunk = 16;
+
+    /// <summary>Probe → Agent：列块（点对点会话的发件箱）。</summary>
+    public const byte ColumnBlock = 17;
+}
+
+public static class MoShiroCapabilities
+{
+    public const string Base = "moshiro.v1";
+    public const string KindsPrefix = "moshiro.kinds:";
+    public const string BlocksPrefix = "moshiro.blocks:";
+}