Persistence Panel (#22979)

# Summary

This PR adds a new admin panel for persistence.

## Contents

- The panel features information about the current round and detailed
tracking of objects, records and generics.
- The previously introduced toggle-persistence verb has been removed and
integrated into the new panel.
- The panel can be seen by admins, mods and devs, but the
toggle-persistence is still locked to admin permissions only.

## Preview

The images are WIP and subject to change.

<img width="918" height="229" alt="image"
src="https://github.com/user-attachments/assets/16d3d73d-32e6-4907-bdff-d96699c27d49"
/>

<img width="919" height="253" alt="image"
src="https://github.com/user-attachments/assets/92e7f4d9-ccd4-4e79-949d-b8a35039da01"
/>

<img width="923" height="285" alt="image"
src="https://github.com/user-attachments/assets/e3796504-4cc6-4fce-b5f1-4df3486bfbee"
/>

<img width="923" height="270" alt="image"
src="https://github.com/user-attachments/assets/9fbb185d-181a-40ec-b89b-58eafcd47e4d"
/>

code/controllers/subsystems/persistence/persistence_objects_sql.dm

@@ -21,8 +21,8 @@
 	qdel(cleanup_query)
 
 /**
- * Retrieve persistent data entries that haven't expired.
- * RETURN: List of JSON, with ID, author_ckey, type, content, x, y, z
+ * Retrieve active persistent object entries that have not expired.
+ * RETURN: List of associative lists, each containing ID, author_ckey, type, content, x, y, z, created_at, and expires_at.
  */
 /datum/controller/subsystem/persistence/proc/objectsDatabaseGetActiveEntries()
 	PRIVATE_PROC(TRUE)
@@ -30,7 +30,7 @@
 		return
 
 	var/datum/db_query/get_query = SSdbcore.NewQuery(
-		"SELECT id, author_ckey, type, content, x, y, z FROM ss13_persistent_objects WHERE NOW() < expires_at"
+		"SELECT id, author_ckey, type, content, x, y, z, created_at, expires_at FROM ss13_persistent_objects WHERE NOW() < expires_at"
 	)
 	get_query.Execute()
 
@@ -47,7 +47,9 @@
 				"content" = get_query.item[4],
 				"x" = get_query.item[5],
 				"y" = get_query.item[6],
-				"z" = get_query.item[7]
+				"z" = get_query.item[7],
+				"created_at" = get_query.item[8],
+				"expires_at" = get_query.item[9]
 			)
 			results += list(entry)
 	qdel(get_query)