Remove dupe reaction, log duplicates instead

The 🔁 emoji was being added for duplicate rides. Now we just log the

duplicate server-side without adding any reaction to the message.

Signed-off-by: Blake Ridgway <blake@blakeridgway.com>

scripts/backfill-usernames.sh

@@ -0,0 +1,52 @@
+#!/bin/sh
+# Backfill stale usernames in distance_logs so every row for a given user
+# uses the most recent username. This prevents duplicate leaderboard entries
+# if any user changed their Discord display name.
+#
+# Usage:
+#   On the host:  sh scripts/backfill-usernames.sh
+#   Remotely:     ssh root@172.16.0.101 "sh -s" < scripts/backfill-usernames.sh
+
+JAIL_ROOT="/jails/cyclingbot"
+PG_JAIL="postgres"
+ENV_FILE="${JAIL_ROOT}/var/db/cyclingbot/.env"
+
+if [ ! -f "$ENV_FILE" ]; then
+    echo "Error: $ENV_FILE not found"
+    exit 1
+fi
+
+# Extract DATABASE_URL from .env (ignore quoted/unquoted values)
+DATABASE_URL=$(grep '^DATABASE_URL=' "$ENV_FILE" | head -1 | cut -d= -f2-)
+
+if [ -z "$DATABASE_URL" ]; then
+    echo "Error: DATABASE_URL not found in $ENV_FILE"
+    exit 1
+fi
+
+echo "=== Backfilling stale usernames ==="
+echo ""
+
+jexec "$PG_JAIL" psql "$DATABASE_URL" -c "
+UPDATE distance_logs dl
+SET username = u.latest_username
+FROM (
+    SELECT user_id, guild_id, username AS latest_username
+    FROM (
+        SELECT user_id, guild_id, username,
+               ROW_NUMBER() OVER (
+                   PARTITION BY user_id, guild_id
+                   ORDER BY logged_at DESC
+               ) AS rn
+        FROM distance_logs
+    ) sub
+    WHERE sub.rn = 1
+) u
+WHERE dl.user_id = u.user_id
+  AND dl.guild_id = u.guild_id
+  AND dl.username != u.latest_username;
+"
+
+echo ""
+echo "=== Backfill complete ==="
+