TaskRetries: init table

src/sql/hydra.sql

@@ -553,6 +553,21 @@ create table StarredJobs (
     foreign key   (project, jobset) references Jobsets(project, name) on update cascade on delete cascade
 );
 
+-- Events processed by hydra-notify which have failed at least once
+--
+-- The payload field contains the original, unparsed payload.
+--
+-- One row is created for each plugin which fails to process the event,
+-- with an increasing retry_at and attempts field.
+create table TaskRetries (
+    id            serial primary key not null,
+    channel       text not null,
+    pluginname    text not null,
+    payload       text not null,
+    attempts      integer not null,
+    retry_at      integer not null
+);
+create index IndexTaskRetriesOrdered on TaskRetries(retry_at asc);
 
 -- The output paths that have permanently failed.
 create table FailedPaths (