track start time for tasks

docs/schema-upgrade-1.3-1.4.sql

@@ -6,6 +6,8 @@ BEGIN;
 -- First the simple stuff. A pair of new host fields.
 ALTER TABLE host ADD COLUMN description TEXT;
 ALTER TABLE host ADD COLUMN comment TEXT;
+-- ...and a new field for tasks
+ALTER TABLE task ADD COLUMN start_time TIMESTAMP;
 
 
 -- The rest updates all the versioned tables to track who did what

docs/schema.sql

@@ -217,6 +217,7 @@ CREATE TABLE task (
 	id SERIAL NOT NULL PRIMARY KEY,
 	state INTEGER,
 	create_time TIMESTAMP NOT NULL DEFAULT NOW(),
+	start_time TIMESTAMP,
 	completion_time TIMESTAMP,
 	channel_id INTEGER NOT NULL REFERENCES channels(id),
 	host_id INTEGER REFERENCES host (id),