feat: add user in db

src/state/app_state.rs

@@ -1,7 +1,9 @@
 use crate::providers::ollama::client::OllamaProvider;
+use sqlx::PgPool;
 use std::sync::Arc;
 
 #[derive(Clone)]
 pub struct AppState {
     pub ollama: Arc<OllamaProvider>,
+    pub postgres: PgPool,
 }