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/src/postgres/observability.rs

@@ -1,9 +1,47 @@
 use super::*;
 
+fn invocation_history_loss_category(error: &RegistryError) -> InvocationHistoryLossCategory {
+    match error {
+        RegistryError::Storage(error)
+            if error
+                .as_database_error()
+                .and_then(|database_error| database_error.code())
+                .is_some_and(|code| code.starts_with("22") || code.starts_with("23")) =>
+        {
+            InvocationHistoryLossCategory::InvalidRecord
+        }
+        RegistryError::Storage(_) => InvocationHistoryLossCategory::Unavailable,
+        _ => InvocationHistoryLossCategory::InvalidRecord,
+    }
+}
+
 impl PostgresRegistry {
+    pub async fn delete_invocation_logs_before(
+        &self,
+        cutoff: OffsetDateTime,
+    ) -> Result<u64, RegistryError> {
+        let result = sqlx::query("delete from invocation_logs where created_at < $1::timestamptz")
+            .bind(cutoff)
+            .execute(&self.pool)
+            .await?;
+        Ok(result.rows_affected())
+    }
+
     pub async fn create_invocation_log(
         &self,
         request: CreateInvocationLogRequest<'_>,
+    ) -> InvocationHistoryWriteOutcome {
+        match self.try_create_invocation_log(request).await {
+            Ok(()) => InvocationHistoryWriteOutcome::Recorded,
+            Err(error) => InvocationHistoryWriteOutcome::Lost(InvocationHistoryLoss {
+                category: invocation_history_loss_category(&error),
+            }),
+        }
+    }
+
+    async fn try_create_invocation_log(
+        &self,
+        request: CreateInvocationLogRequest<'_>,
     ) -> Result<(), RegistryError> {
         let request_preview = crank_core::sanitize_invocation_preview(&request.log.request_preview);
         let response_preview =