Show job name in notifications via dynamic runtime lookup

Instead of embedding the name as a literal string at job creation time,
ExecStopPost now greps # SYSTAB_NAME= from the service file at runtime.
This ensures notifications always show the current name even for jobs
created without a name or renamed after their ExecStopPost was written.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

badges/tests.json

@@ -1,6 +1,6 @@
 {
   "schemaVersion": 1,
   "label": "tests",
-  "message": "81 passed",
+  "message": "83 passed",
   "color": "brightgreen"
 }