Relocate user-store.db/room-store.db when migrating Discord bridge files

Refer to 524436ebef and #230 (Github Issue).

roles/matrix-bridge-appservice-discord/tasks/setup_install.yml

@@ -32,10 +32,12 @@
   failed_when: false
   when: "matrix_appservice_discord_stat_db.stat.exists"
 
-# In addition to this, there used to be some `user-store-db` and `room-store.db` files.
-# They're no longer in use, so we're not relocating them in an effort to point them out as neither `./data`, nor `./config`.
 - name: (Data relocation) Move AppService Discord discord.db file to ./data directory
-  command: "mv {{ matrix_appservice_discord_base_path }}/discord.db {{ matrix_appservice_discord_data_path }}/discord.db"
+  command: "mv {{ matrix_appservice_discord_base_path }}/{{ item }} {{ matrix_appservice_discord_data_path }}/{{ item }}"
+  with_items:
+    - discord.db
+    - user-store.db
+    - room-store.db
   when: "matrix_appservice_discord_stat_db.stat.exists"
 
 - name: Ensure AppService Discord config.yaml installed