feat: Add tracing and md5 dependency

Adds the `tracing` and `md5` crates to the project, enabling enhanced
logging and cryptographic hashing capabilities. Includes `TraceLayer`
for HTTP request tracing and configures `tracing-subscriber` with
`EnvFilter`.

Cargo.toml

@@ -13,4 +13,6 @@ axum = "0.8.8"
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = "1.0.149"
 tokio = { version = "1.49.0", features = ["full"] }
-tracing-subscriber = "0.3.22"
+tracing-subscriber = { version = "0.3.22", features = ["env-filter"] }
+md5 = "0.8.0"
+tower-http = {version = "0.6.8", features = ["trace"]}