chore: bootstrap housing research platform

apps/api/src/db.rs

@@ -0,0 +1,13 @@
+use anyhow::{Context, Result};
+use sqlx::postgres::PgPoolOptions;
+use sqlx::PgPool;
+use std::time::Duration;
+
+pub async fn create_pool(database_url: &str) -> Result<PgPool> {
+    PgPoolOptions::new()
+        .max_connections(8)
+        .acquire_timeout(Duration::from_secs(5))
+        .connect(database_url)
+        .await
+        .context("failed to connect to PostgreSQL")
+}