feat: Initialize backend project by adding Cargo.toml with package metadata, dependencies, and binary targets.

Author: zerox80

backend/Cargo.toml

@@ -20,7 +20,7 @@ tower_governor = "0.8"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 sqlx = { version = "0.8", features = ["runtime-tokio-rustls", "sqlite"] }
-jsonwebtoken = { version = "10.2", features = ["rust_crypto"] }
+jsonwebtoken = "9.3"
 bcrypt = "0.17"
 chrono = { version = "0.4", features = ["serde"] }
 dotenv = "0.15"