Return communication database rows from communication API

This is a pretty big refactor of how communication works to start moving
us in the direction we want to go long-term. This adds the new
communication row and migrates existing reports to add rows for
communication.

There's also a bunch of automatic fixes from the new linter. I should
have added them separately, but whatever.

cmd/passwordgen/main.go

@@ -26,7 +26,7 @@ func main() {
 }
 
 func scanValue(message string, result *string) {
-	fmt.Printf(message)
+	fmt.Print("%s", message)
 	scanner := bufio.NewScanner(os.Stdin)
 	if ok := scanner.Scan(); !ok {
 		log.Fatal(errors.New("Failed to scan input"))