наблюдаемость: завершить базовый контур Community

Добавить структурированные журналы, метрики, трассировку и безопасный канал критических ошибок. Усилить границы рантайма, тесты, проверку зависимостей и сценарии развёртывания.

crates/crank-registry/tests/integration/migrations.rs

@@ -0,0 +1,44 @@
+use crank_registry::PostgresRegistry;
+use sqlx::Row;
+
+#[tokio::test]
+async fn core_migration_is_versioned_and_safe_under_concurrent_startup() {
+    let database_url = crank_test_support::postgres_schema_url("test_core_migration").await;
+
+    let (first, second) = tokio::join!(
+        PostgresRegistry::connect(&database_url),
+        PostgresRegistry::connect(&database_url),
+    );
+    let first = first.expect("first service startup must apply the migration");
+    second.expect("second service startup must observe the applied migration");
+
+    let rows = sqlx::query(
+        "select version, description, checksum from __crank_core_migrations order by version",
+    )
+    .fetch_all(first.pool())
+    .await
+    .expect("migration ledger must be readable");
+
+    assert_eq!(rows.len(), 1);
+    assert_eq!(rows[0].get::<i32, _>("version"), 1);
+    assert_eq!(
+        rows[0].get::<String, _>("description"),
+        "community baseline"
+    );
+    assert_eq!(
+        rows[0].get::<String, _>("checksum"),
+        "crank-community-baseline-v1"
+    );
+
+    let approval_columns = sqlx::query(
+        "select column_name
+         from information_schema.columns
+         where table_schema = current_schema()
+           and table_name = 'approval_requests'
+           and column_name in ('execution_started_at', 'execution_attempts', 'request_fingerprint')",
+    )
+    .fetch_all(first.pool())
+    .await
+    .expect("approval schema must be readable");
+    assert_eq!(approval_columns.len(), 3);
+}