feat: add provisioner job hang detector (#7927)

coderd/database/queries/lock.sql

@@ -3,8 +3,6 @@
 --
 -- This must be called from within a transaction. The lock will be automatically
 -- released when the transaction ends.
---
--- Use database.LockID() to generate a unique lock ID from a string.
 SELECT pg_advisory_xact_lock($1);
 
 -- name: TryAcquireLock :one
@@ -12,6 +10,4 @@ SELECT pg_advisory_xact_lock($1);
 --
 -- This must be called from within a transaction. The lock will be automatically
 -- released when the transaction ends.
---
--- Use database.LockID() to generate a unique lock ID from a string.
 SELECT pg_try_advisory_xact_lock($1);

coderd/database/queries/provisionerjobs.sql

@@ -128,3 +128,13 @@ SET
 	error_code = $5
 WHERE
 	id = $1;
+
+-- name: GetHungProvisionerJobs :many
+SELECT
+	*
+FROM
+	provisioner_jobs
+WHERE
+	updated_at < $1
+	AND started_at IS NOT NULL
+	AND completed_at IS NULL;