feat: env_logger ~> tracing_subscriber (#997)

This PR adds advanced Tracing:
- Supports spans, which represent scopes of work and 
can include nested spans for hierarchical logging.
- Collects rich metadata about events and spans (e.g., source location, fields, etc.).
- Allows dynamic configuration and advanced filtering (e.g., by span, field, or metadata).

Subscribers:
- Provides customizable subscribers for processing 
trace data (e.g., fmt, json, or custom handlers).
- Offers flexibility in output formats, including JSON or custom formats.
- Integration: Works with other tools like tracing-opentelemetry for distributed tracing.

Author: Devdutt Shenoi

Cargo.lock

@@ -55,7 +55,6 @@ clap = { version = "4.1", default-features = false, features = [
 clokwerk = "0.4"
 crossterm = "0.28.1"
 derive_more = "0.99.18"
-env_logger = "0.11.3"
 fs_extra = "1.3"
 futures = "0.3"
 futures-util = "0.3.28"
@@ -90,6 +89,7 @@ tokio = { version = "1.28", default-features = false, features = [
   "fs",
 ] }
 tokio-stream = { version = "0.1", features = ["fs"] }
+tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
 ulid = { version = "1.0", features = ["serde"] }
 uptime_lib = "0.3.0"
 xxhash-rust = { version = "0.8", features = ["xxh3"] }

server/Cargo.toml

@@ -48,6 +48,7 @@ use std::sync::Arc;
 
 use handlers::http::modal::ParseableServer;
 use option::{Mode, CONFIG};
+use tracing_subscriber::EnvFilter;
 
 use crate::handlers::http::modal::{
     ingest_server::IngestServer, query_server::QueryServer, server::Server,
@@ -56,7 +57,10 @@ pub const STORAGE_UPLOAD_INTERVAL: u32 = 60;
 
 #[actix_web::main]
 async fn main() -> anyhow::Result<()> {
-    env_logger::init();
+    tracing_subscriber::fmt()
+        .with_env_filter(EnvFilter::from_default_env())
+        .compact()
+        .init();
 
     // these are empty ptrs so mem footprint should be minimal
     let server: Arc<dyn ParseableServer> = match CONFIG.parseable.mode {