Fix overdue check to compare real timestamps, not whole calendar days

WorkflowRunner::isOverdue() took Card::getDaysUntilDue(), which Deck
computes by truncating both "now" and the due date to midnight before
diffing. A card due earlier today therefore reported 0 days until due -
not overdue - until the calendar date rolled over to the next day, so
a card due "this morning" sat unmoved for up to 24h while one due
"yesterday morning" moved immediately. isOverdue() now takes the due
date and $now directly and compares them as real timestamps, matching
what Deck's own UI shows.

Bump to 34.0.2.

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "workflow_deck_automation",
-	"version": "34.0.1",
+	"version": "34.0.2",
 	"private": true,
 	"type": "module",
 	"description": "Automates moving overdue Deck cards between stacks, configurable per user.",