feat: automatically discover inventory (#127)

## Fully automated inventory gathering now works!

Boot up harmony_inventory_agent with `cargo run -p harmony_inventory_agent`
Launch the DiscoverInventoryAgentScore , currently available this way :

`RUST_LOG=info cargo run -p example-cli -- -f Discover -y`

And you will have automatically all hosts saved to the database. Run `cargo sqlx setup` if you have not done it yet.

Co-authored-by: Ian Letourneau <ian@noma.to>
Reviewed-on: #127
Co-authored-by: Jean-Gabriel Gill-Couture <jg@nationtech.io>
Co-committed-by: Jean-Gabriel Gill-Couture <jg@nationtech.io>

harmony_inventory_agent/src/hwinfo.rs

@@ -1,3 +1,4 @@
+use harmony_types::net::MacAddress;
 use log::{debug, warn};
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
@@ -18,7 +19,7 @@ pub struct PhysicalHost {
     pub host_uuid: String,
 }
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct StorageDrive {
     pub name: String,
     pub model: String,
@@ -32,13 +33,30 @@ pub struct StorageDrive {
     pub smart_status: Option<String>,
 }
 
+impl StorageDrive {
+    pub fn dummy() -> Self {
+        Self {
+            name: String::new(),
+            model: String::new(),
+            serial: String::new(),
+            size_bytes: 0,
+            logical_block_size: 0,
+            physical_block_size: 0,
+            rotational: false,
+            wwn: None,
+            interface_type: String::new(),
+            smart_status: None,
+        }
+    }
+}
+
 #[derive(Serialize, Deserialize, Debug)]
 pub struct StorageController {
     pub name: String,
     pub driver: String,
 }
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct MemoryModule {
     pub size_bytes: u64,
     pub speed_mhz: Option<u32>,
@@ -48,7 +66,7 @@ pub struct MemoryModule {
     pub rank: Option<u8>,
 }
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct CPU {
     pub model: String,
     pub vendor: String,
@@ -63,10 +81,10 @@ pub struct Chipset {
     pub vendor: String,
 }
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct NetworkInterface {
     pub name: String,
-    pub mac_address: String,
+    pub mac_address: MacAddress,
     pub speed_mbps: Option<u32>,
     pub is_up: bool,
     pub mtu: u32,
@@ -76,6 +94,24 @@ pub struct NetworkInterface {
     pub firmware_version: Option<String>,
 }
 
+impl NetworkInterface {
+    pub fn dummy() -> Self {
+        use harmony_macros::mac_address;
+
+        Self {
+            name: String::new(),
+            mac_address: mac_address!("00:00:00:00:00:00"),
+            speed_mbps: Some(0),
+            is_up: false,
+            mtu: 0,
+            ipv4_addresses: vec![],
+            ipv6_addresses: vec![],
+            driver: String::new(),
+            firmware_version: None,
+        }
+    }
+}
+
 #[derive(Serialize, Deserialize, Debug)]
 pub struct ManagementInterface {
     pub kind: String,
@@ -509,6 +545,7 @@ impl PhysicalHost {
 
             let mac_address = Self::read_sysfs_string(&iface_path.join("address"))
                 .map_err(|e| format!("Failed to read MAC address for {}: {}", iface_name, e))?;
+            let mac_address = MacAddress::try_from(mac_address).map_err(|e| e.to_string())?;
 
             let speed_mbps = if iface_path.join("speed").exists() {
                 match Self::read_sysfs_u32(&iface_path.join("speed")) {