- add: utils library

- add: packet-service to handle game client packets
- fix: health check for database-service
- fix: health check for auth-service

packet-service/src/metrics.rs

@@ -0,0 +1,22 @@
+use prometheus::{Encoder, TextEncoder, Counter, Gauge, Histogram, register_counter, register_gauge, register_histogram};
+use lazy_static::lazy_static;
+
+lazy_static! {
+    // Counter to track the number of packets received
+    pub static ref PACKETS_RECEIVED: Counter = register_counter!(
+        "packets_received_total",
+        "Total number of packets received"
+    ).unwrap();
+
+    // Gauge to track the number of active connections
+    pub static ref ACTIVE_CONNECTIONS: Gauge = register_gauge!(
+        "active_connections",
+        "Number of currently active connections"
+    ).unwrap();
+
+    // Histogram to track packet processing latency
+    pub static ref PACKET_PROCESSING_TIME: Histogram = register_histogram!(
+        "packet_processing_time_seconds",
+        "Histogram of packet processing times"
+    ).unwrap();
+}