feat: initialize rust backend with axum server, seaorm models, and project scaffolding

backend/Cargo.toml

@@ -0,0 +1,43 @@
+[package]
+name = "zhealth-backend"
+version = "0.1.0"
+edition = "2024"
+
+[[bin]]
+name = "zhealth"
+path = "src/main.rs"
+
+[dependencies]
+# Web Framework
+axum = "0.8"
+tokio = { version = "1", features = ["full"] }
+tower = "0.5"
+tower-http = { version = "0.6", features = ["cors", "trace"] }
+
+# Database
+sea-orm = { version = "1.1", features = ["sqlx-sqlite", "runtime-tokio-rustls", "macros"] }
+
+# Serialization
+serde = { version = "1", features = ["derive"] }
+serde_yaml = "0.9"
+
+# Auth
+argon2 = "0.5"
+rand = "0.8"
+
+# Time
+chrono = { version = "0.4", features = ["serde"] }
+
+# Logging
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+
+# Error handling
+thiserror = "2"
+anyhow = "1"
+
+# Regex for config env expansion
+regex = "1"
+
+# CLI
+argh = "0.1"