feat(library): time to beat from IGDB

src/main/resources/application.yml

@@ -43,6 +43,12 @@ app:
     api-key: ${STEAM_API_KEY}
     base-url: https://api.steampowered.com
     imageService-url: https://cdn.cloudflare.steamstatic.com/steam/apps/
+  igdb:
+    # A Twitch developer app (dev.twitch.tv). Without both values time to beat is off.
+    client-id: ${IGDB_CLIENT_ID:}
+    client-secret: ${IGDB_CLIENT_SECRET:}
+    base-url: https://api.igdb.com/v4
+    token-base-url: https://id.twitch.tv
   library:
     sync-ttl-hours: 24
     force-sync-cooldown-seconds: 60
@@ -67,4 +73,9 @@ resilience4j:
         # Steam allows ~100k req/day. Cap at ~2 req/s to leave headroom for bursts.
         limit-for-period: 2
         limit-refresh-period: 1s
-        timeout-duration: 5s
+        timeout-duration: 5s
+      igdbApi:
+        # IGDB allows 4 requests/s. Taken per HTTP request.
+        limit-for-period: 4
+        limit-refresh-period: 1s
+        timeout-duration: 10s

src/main/resources/db/migration/V6__game_time_to_beat.sql

@@ -0,0 +1,9 @@
+-- Time to beat per Steam app from IGDB, shared by all users. A row with only NULL times means IGDB has no data;
+-- it is kept so the app is not asked again before the row is stale.
+CREATE TABLE game_time_to_beat (
+    appid              BIGINT      PRIMARY KEY,
+    hastily_minutes    INTEGER,
+    normally_minutes   INTEGER,
+    completely_minutes INTEGER,
+    fetched_at         TIMESTAMPTZ NOT NULL
+);