Use testcontainers for Rust PostgreSQL tests

crates/crank-registry/src/postgres/mod.rs

@@ -1009,11 +1009,7 @@ fn usage_bucket_sql(bucket: crate::model::UsageBucket) -> &'static str {
 
 #[cfg(test)]
 mod tests {
-    use std::{
-        collections::BTreeMap,
-        env,
-        time::{SystemTime, UNIX_EPOCH},
-    };
+    use std::collections::BTreeMap;
 
     use crank_core::{
         AgentId, AgentOperationBinding, AgentStatus, AgentVersion, ApiKeyHeaderAuthConfig,
@@ -1917,21 +1913,13 @@ mod tests {
 
     impl TestDatabase {
         async fn new() -> Self {
-            let database_url = env::var("TEST_DATABASE_URL")
-                .expect("TEST_DATABASE_URL must point to a reachable PostgreSQL database");
+            let database_url = crank_test_support::postgres_database_url().await.to_owned();
             let admin_pool = PgPoolOptions::new()
                 .max_connections(1)
                 .connect(&database_url)
                 .await
                 .unwrap();
-            let schema = format!(
-                "test_registry_{}_{}",
-                std::process::id(),
-                SystemTime::now()
-                    .duration_since(UNIX_EPOCH)
-                    .unwrap()
-                    .as_nanos()
-            );
+            let schema = crank_test_support::unique_schema_name("test_registry");
 
             admin_pool
                 .execute(sqlx::query(&format!("create schema {schema}")))