Restructure into workspace with dashboard and agent

shared/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "cm-dashboard-shared"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+chrono = { version = "0.4", features = ["serde"] }

shared/src/envelope.rs

@@ -0,0 +1,19 @@
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "snake_case")]
+pub enum AgentType {
+    Smart,
+    Service,
+    Backup,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct MetricsEnvelope {
+    pub hostname: String,
+    pub agent_type: AgentType,
+    pub timestamp: u64,
+    #[serde(default)]
+    pub metrics: Value,
+}

shared/src/lib.rs

@@ -0,0 +1 @@
+pub mod envelope;