fix: support discordIds array format for Seerr 3.3 compatibility

Seerr v3.3.0 renamed the discordId (string) field to discordIds (array)
in user settings. This caused all Discord user lookups to fail with
"unauthorized" since the mapping always came back empty.

- Read discordIds (array) first, fall back to discordId (string) for
  older Overseerr/Jellyseerr installs
- Support multiple Discord IDs per user in the discord-users mapping

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dhpup

src/doplarr/backends/overseerr/impl.clj

@@ -100,17 +100,21 @@
                      (into [])))
          (else #(fatal % "Exception on querying Overseerr users")))))
 
-(defn discord-id [ovsr-id]
+(defn discord-ids [ovsr-id]
   (a/go
     (->> (a/<! (GET (str "/user/" ovsr-id)))
-         (then #(->> (utils/from-camel %)
-                     (s/select-one [:body :settings :discord-id])))
-         (else #(fatal % "Exception on querying Overseerr discord id")))))
+         (then (fn [result]
+                 (let [settings (s/select-one [:body :settings] (utils/from-camel result))]
+                   (or (seq (:discord-ids settings))
+                       (when-let [id (:discord-id settings)] [id])
+                       []))))
+         (else #(fatal % "Exception on querying Overseerr discord ids")))))
 
 (defn discord-users []
   (a/go-loop [ids (a/<! (all-users))
               users {}]
     (if (empty? ids)
       users
-      (let [id (first ids)]
-        (recur (rest ids) (assoc users (a/<! (discord-id id)) id))))))
+      (let [id (first ids)
+            disc-ids (a/<! (discord-ids id))]
+        (recur (rest ids) (merge users (into {} (map #(vector % id) disc-ids))))))))