Add patreon-sharing option

migrations/20250924203400_patreon_link.sql

@@ -0,0 +1,11 @@
+CREATE TABLE patreon_link
+(
+    user_id      BIGINT UNSIGNED NOT NULL,
+    guild_id     BIGINT UNSIGNED NOT NULL,
+    linked_at    DATETIME DEFAULT CURRENT_TIMESTAMP,
+
+    PRIMARY KEY (user_id),
+    INDEX `idx_user_id` (user_id),
+    INDEX `idx_guild_id` (guild_id),
+    INDEX `idx_linked_at` (linked_at)
+);