fix: tolerate season-reset payloads in /sq-info and stop duplicate error embeds

obtain_clan_new_points treated a missing `astat` or `member_ratings` block as
"squadron unavailable or deleted". After a season reset the game API omits those
blocks for inactive/unranked squadrons even though the clan and its roster still
exist, so /sq-info wrongly reported real squadrons (e.g. DSPL, 513th) as
nonexistent. Require a `members` roster to consider the payload valid (genuinely
deleted clans return CLAN_IS_NOT_EXISTS JSON handled upstream) and default both
stat blocks to zero, so the squadron renders at 0 points instead of erroring.

permission_fail was invoked twice per error because discord.py dispatches to
both the command-local `@cmd.error` handler and the global `@tree.error`
handler. Combined with a public defer, this produced a duplicated error message
(one public, one ephemeral). Guard on interaction.extras so the embed is sent
at most once per interaction.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

BOT/game_api.py

@@ -655,8 +655,20 @@ async def obtain_clan_new_points(
             while isinstance(data, dict) and "member_ratings" not in data and len(data) == 1:
                 data = next(iter(data.values()))
 
-            total_score = data["astat"]["dr_era5_hist"]
-            raw_ratings = data["member_ratings"]
+            # A real clan record always carries a `members` roster. Deleted
+            # clans come back as JSON (handled above), and truncated payloads
+            # raise inside bin_blk_to_json, so a parsed BLK without `members`
+            # is genuinely unavailable.
+            if not isinstance(data, dict) or "members" not in data:
+                raise KeyError("members")
+
+            # After a season reset the game API can omit the aggregate `astat`
+            # block and/or the per-member `member_ratings` block for inactive
+            # squadrons even though the clan and its roster still exist. Default
+            # both to zero so the squadron renders at 0 points instead of being
+            # reported as deleted.
+            total_score = (data.get("astat") or {}).get("dr_era5_hist", 0)
+            raw_ratings = data.get("member_ratings") or {}
 
         except ClanInfoError as e:
             try: