feat(library): add IGDB editions, game links and auditor queue

Tables game_edition (IGDB "same game" id per library key), game_link
(global sets set by auditors), game_link_pair (queue of IGDB and
requested pairs), game_link_request and account_name. Fetch IGDB
editions, link and unlink with audit rows, serve the paged auditor queue
with request counts. WireMock recordings for the editions query.

src/main/resources/application.yml

@@ -62,6 +62,7 @@ app:
     achievement-ttl-hours: 1
     schema-ttl-days: 30
     speedrun-ttl-days: 30
+    edition-ttl-days: 30
     # Reported broken pictures, repaired after the nightly sync.
     image-repair-cron: "0 30 1 * * *"
     image-repair-batch: 200