Finalize SPC outlook feature addition and clean up implemented roadmap documentation

internal/sources/spc/convective_outlook.go

@@ -377,11 +377,7 @@ func latestIssueTime(raw []byte) time.Time {
 }
 
 func discussionUpdatedTime(rawHTML string) time.Time {
-	text, err := spcprovider.ExtractProductText(rawHTML)
-	if err != nil {
-		return time.Time{}
-	}
-	t := spcprovider.ParseUpdatedTimestamp(text)
+	t := spcprovider.ParsePageUpdatedTimestamp(rawHTML)
 	if t == nil {
 		return time.Time{}
 	}