events: add v1.6.8-aio.2

Preserves ticket waves when a client edits an event without them
(aiolabs/events#65) and exposes waves on public event responses so a
buyer can choose a tier (#66). No schema change.

Added alongside v1.6.8-aio.1 rather than over it — instances still on
the previous version need theirs to stay resolvable.

Archive sha256 verified against two independent fetches, and the archive
spot-checked for both changes. Prerequisite for aiolabs/webapp#176,
which is merged to dev.

extensions.json

@@ -365,6 +365,16 @@
             "archive": "https://git.atitlan.io/aiolabs/events/archive/v1.6.8-aio.1.zip",
             "hash": "3a59056914ca8ca85bcf4415bd639216460f2ee3b1f96bfa8a9d6d4237216b05"
         },
+        {
+            "id": "events",
+            "repo": "https://git.atitlan.io/aiolabs/events",
+            "name": "AIO Events",
+            "version": "1.6.8-aio.2",
+            "short_description": "Ticket waves are no longer destroyed by a client that edits an event without them, and they now appear on public event responses so a buyer can pick which tier to buy — previously only the organiser could see them, and the purchase endpoint refused whenever more than one wave was open.",
+            "icon": "https://git.atitlan.io/aiolabs/events/raw/branch/main/static/image/events.png",
+            "archive": "https://git.atitlan.io/aiolabs/events/archive/v1.6.8-aio.2.zip",
+            "hash": "e6ece033103b716790f1c6a01c58aac281518e102ce5fe9bfd782102ec165f3d"
+        },
         {
             "id": "nostrclient",
             "repo": "https://git.atitlan.io/aiolabs/nostrclient",