Use sqlc.embed to embed a RiverJob row during unique insertion

Follows up #451 with a significant code quality improvement in which we
can use `sqlc.embed` (which TIL about) to embed a `RiverJob` row
directly on the returned struct, which means we can use our normal
`jobRowFromInternal` to map it to a driver result instead of having to
manually construct `RiverJob` property by property.

Tipped off to the existence of `sqlc.embed` by @tadejsv [1]. Thank you!

[1] #451 (comment)

Author: brandur

riverdriver/riverdatabasesql/internal/dbsqlc/river_job.sql.go

@@ -302,25 +302,7 @@ func (e *Executor) JobInsertUnique(ctx context.Context, params *riverdriver.JobI
 		return nil, interpretError(err)
 	}
 
-	jobRow, err := jobRowFromInternal(&dbsqlc.RiverJob{
-		ID:          insertRes.ID,
-		Args:        insertRes.Args,
-		Attempt:     insertRes.Attempt,
-		AttemptedAt: insertRes.AttemptedAt,
-		AttemptedBy: insertRes.AttemptedBy,
-		CreatedAt:   insertRes.CreatedAt,
-		Errors:      insertRes.Errors,
-		FinalizedAt: insertRes.FinalizedAt,
-		Kind:        insertRes.Kind,
-		MaxAttempts: insertRes.MaxAttempts,
-		Metadata:    insertRes.Metadata,
-		Priority:    insertRes.Priority,
-		Queue:       insertRes.Queue,
-		ScheduledAt: insertRes.ScheduledAt,
-		State:       insertRes.State,
-		Tags:        insertRes.Tags,
-		UniqueKey:   insertRes.UniqueKey,
-	})
+	jobRow, err := jobRowFromInternal(&insertRes.RiverJob)
 	if err != nil {
 		return nil, err
 	}

riverdriver/riverdatabasesql/river_database_sql.go

@@ -316,7 +316,7 @@ INSERT INTO river_job(
 ON CONFLICT (kind, unique_key) WHERE unique_key IS NOT NULL
     -- Something needs to be updated for a row to be returned on a conflict.
     DO UPDATE SET kind = EXCLUDED.kind
-RETURNING *, (xmax != 0) AS unique_skipped_as_duplicate;
+RETURNING sqlc.embed(river_job), (xmax != 0) AS unique_skipped_as_duplicate;
 
 -- Run by the rescuer to queue for retry or discard depending on job state.
 -- name: JobRescueMany :exec

riverdriver/riverpgxv5/internal/dbsqlc/river_job.sql

@@ -296,25 +296,7 @@ func (e *Executor) JobInsertUnique(ctx context.Context, params *riverdriver.JobI
 		return nil, interpretError(err)
 	}
 
-	jobRow, err := jobRowFromInternal(&dbsqlc.RiverJob{
-		ID:          insertRes.ID,
-		Args:        insertRes.Args,
-		Attempt:     insertRes.Attempt,
-		AttemptedAt: insertRes.AttemptedAt,
-		AttemptedBy: insertRes.AttemptedBy,
-		CreatedAt:   insertRes.CreatedAt,
-		Errors:      insertRes.Errors,
-		FinalizedAt: insertRes.FinalizedAt,
-		Kind:        insertRes.Kind,
-		MaxAttempts: insertRes.MaxAttempts,
-		Metadata:    insertRes.Metadata,
-		Priority:    insertRes.Priority,
-		Queue:       insertRes.Queue,
-		ScheduledAt: insertRes.ScheduledAt,
-		State:       insertRes.State,
-		Tags:        insertRes.Tags,
-		UniqueKey:   insertRes.UniqueKey,
-	})
+	jobRow, err := jobRowFromInternal(&insertRes.RiverJob)
 	if err != nil {
 		return nil, err
 	}