Add more detailed new revision job handling

Create a new events table for the new guix revision jobs, and update this when
processing a job starts, as well as finished with success or failure.

Additionally, remove the dependnency on open-inferior/container, as this
functionality isn't merged in to Guix master yet.

sqitch/deploy/load_new_guix_revision_job_events.sql

@@ -0,0 +1,18 @@
+-- Deploy guix-data-service:load_new_guix_revision_job_events to pg
+
+BEGIN;
+
+CREATE TYPE job_event AS ENUM ('start', 'failure', 'success');
+
+ALTER TABLE ONLY load_new_guix_revision_jobs
+    ADD CONSTRAINT load_new_guix_revision_jobs_id UNIQUE (id);
+
+CREATE TABLE load_new_guix_revision_job_events (
+    id integer GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
+    job_id integer NOT NULL,
+    event job_event NOT NULL,
+    occurred_at timestamp without time zone NOT NULL DEFAULT clock_timestamp(),
+    CONSTRAINT job_id FOREIGN KEY (job_id) REFERENCES load_new_guix_revision_jobs (id)
+);
+
+COMMIT;