Release 0.1.4 — next healthcheck due date

Bumps the plugin header, ATT_HC_VERSION and updates.json so PUC offers the
next-due feature to installed sites on their next update check.

NOTE: the history server must be deployed before this reaches sites. An old
server ignores the next_due key on PUT and returns 200, so the plugin would
report the date as saved while the dashboard never shows it.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

updates.json

@@ -1,12 +1,12 @@
 {
     "name": "ATT Site Healthcheck",
     "slug": "att-site-healthcheck",
-    "version": "0.1.3",
+    "version": "0.1.4",
     "author": "Steve Hanlon",
     "requires": "6.0",
     "tested": "6.6",
     "requires_php": "7.4",
-    "last_updated": "2026-07-16 13:00:00",
+    "last_updated": "2026-07-23 12:03:38",
     "download_url": "https://git.h12e.com/steve/wp-healthcheck/archive/main.zip",
     "sections": {
         "description": "Walks a technician through a structured WordPress site healthcheck. Steps are drop-in PHP files so adding/removing one is a single file change.",