fix: add missing file, oops

lib/libpk/src/state.rs

@@ -0,0 +1,12 @@
+#[derive(serde::Serialize, serde::Deserialize, Clone, Default)]
+pub struct ShardState {
+    pub shard_id: i32,
+    pub up: bool,
+    pub disconnection_count: i32,
+    /// milliseconds
+    pub latency: i32,
+    /// unix timestamp
+    pub last_heartbeat: i32,
+    pub last_connection: i32,
+    pub cluster_id: Option<i32>,
+}