feat: expand workspace to include libertas_infra and libertas_worker

feat(libertas_api): add dependency on libertas_infra and async-nats

refactor(libertas_api): consolidate config loading and add broker_url

refactor(libertas_api): integrate NATS client into app state and services

feat(libertas_core): introduce config module for database and server settings

fix(libertas_core): enhance error handling with detailed messages

feat(libertas_infra): create infrastructure layer with database repositories

feat(libertas_infra): implement Postgres repositories for media and albums

feat(libertas_worker): add worker service to process media jobs via NATS

libertas_infra/src/repositories/user_repository.rs

@@ -0,0 +1,96 @@
+use async_trait::async_trait;
+use libertas_core::{
+    error::{CoreError, CoreResult},
+    models::User,
+    repositories::UserRepository,
+};
+use sqlx::{PgPool, SqlitePool, types::Uuid};
+
+#[derive(Clone)]
+pub struct PostgresUserRepository {
+    pool: PgPool,
+}
+
+impl PostgresUserRepository {
+    pub fn new(pool: PgPool) -> Self {
+        Self { pool }
+    }
+}
+
+#[derive(Clone)]
+pub struct SqliteUserRepository {
+    _pool: SqlitePool,
+}
+
+impl SqliteUserRepository {
+    pub fn new(pool: SqlitePool) -> Self {
+        Self { _pool: pool }
+    }
+}
+
+#[async_trait]
+impl UserRepository for PostgresUserRepository {
+    async fn create(&self, user: User) -> CoreResult<()> {
+        sqlx::query!(
+            r#"
+            INSERT INTO users (id, username, email, hashed_password, created_at, updated_at)
+            VALUES ($1, $2, $3, $4, $5, $6)
+            "#,
+            user.id,
+            user.username,
+            user.email,
+            user.hashed_password,
+            user.created_at,
+            user.updated_at
+        )
+        .execute(&self.pool)
+        .await
+        .map_err(|e| CoreError::Database(e.to_string()))?;
+
+        Ok(())
+    }
+
+    async fn find_by_email(&self, email: &str) -> CoreResult<Option<User>> {
+        sqlx::query_as!(User, "SELECT * FROM users WHERE email = $1", email)
+            .fetch_optional(&self.pool)
+            .await
+            .map_err(|e| CoreError::Database(e.to_string()))
+    }
+
+    async fn find_by_username(&self, username: &str) -> CoreResult<Option<User>> {
+        sqlx::query_as!(User, "SELECT * FROM users WHERE username = $1", username)
+            .fetch_optional(&self.pool)
+            .await
+            .map_err(|e| CoreError::Database(e.to_string()))
+    }
+
+    async fn find_by_id(&self, id: Uuid) -> CoreResult<Option<User>> {
+        sqlx::query_as!(User, "SELECT * FROM users WHERE id = $1", id)
+            .fetch_optional(&self.pool)
+            .await
+            .map_err(|e| CoreError::Database(e.to_string()))
+    }
+}
+
+#[async_trait]
+impl UserRepository for SqliteUserRepository {
+    async fn create(&self, _user: User) -> CoreResult<()> {
+        println!("SQLITE REPO: Creating user");
+        Ok(())
+    }
+
+    async fn find_by_email(&self, _email: &str) -> CoreResult<Option<User>> {
+        println!("SQLITE REPO: Finding user by email");
+        Ok(None)
+    }
+
+    async fn find_by_username(&self, _username: &str) -> CoreResult<Option<User>> {
+        println!("SQLITE REPO: Finding user by username");
+        Ok(None)
+    }
+
+    async fn find_by_id(&self, _id: Uuid) -> CoreResult<Option<User>> {
+        println!("SQLITE REPO: Finding user by id");
+        Ok(None)
+    }
+}