Fixed lint issues and missing documentation

internal/config/conf_source_sleeper.go

@@ -2,17 +2,19 @@ package config
 
 import "reflect"
 
+// JSCKSourceSleeper is the sleeper source's configuration key.
 const JSCKSourceSleeper string = "sleeper"
 
+// JobSearchConfigSourceSleeper configures the sleeper, a test source that
+// simulates work by sleeping. With BlockShutdown its work ignores
+// cancellation, to test shutdown waiting on a non-cooperative task.
 type JobSearchConfigSourceSleeper struct {
 	JobSearchConfigSource
 	BlockShutdown bool `cfg:"block_shutdown"`
 }
 
-/*
- * General section functions
- * See related methods in section.go
- */
+// ---------- Section methods (see Section) ----------
+
 func (c JobSearchConfigSourceSleeper) Map() map[string]any { return mapOf(c) }
 
 func (c JobSearchConfigSourceSleeper) Flatten() map[string]any {