Added: Update all mod pages upon adding collection.

I think I'll change this to update at download time though.
This makes adding collections a bit too slow.

src/Networking/NexusMods.Networking.NexusWebApi/NexusModsLibrary.Collections.cs

@@ -55,7 +55,7 @@ public partial class NexusModsLibrary
         var collectionEntityId = UpdateCollectionInfo(db, tx, slug, collectionRevisionInfo.Collection);
         var collectionRevisionEntityId = UpdateRevisionInfo(db, tx, revisionNumber, collectionEntityId, collectionRevisionInfo);
 
-        var resolvedEntitiesLookup = ResolveModFiles(db, tx, collectionRoot, gameIds, collectionRevisionInfo);
+        var resolvedEntitiesLookup = await ResolveModFiles(db, tx, collectionRoot, gameIds, collectionRevisionInfo);
         UpdateFiles(db, tx, collectionRevisionEntityId, collectionRevisionInfo, collectionRoot, gameIds, resolvedEntitiesLookup);
 
         var results = await tx.Commit();
@@ -207,7 +207,7 @@ private static List<ModAndDownload> GatherDownloads(CollectionDownload.ReadOnly[
         return list;
     }
 
-    private static ResolvedEntitiesLookup ResolveModFiles(
+    private async Task<ResolvedEntitiesLookup> ResolveModFiles(
         IDb db,
         ITransaction tx,
         CollectionRoot collectionRoot,
@@ -232,6 +232,7 @@ private static ResolvedEntitiesLookup ResolveModFiles(
             {
                 modEntityId = file.Mod.Resolve(db, tx);
                 modPageIds[uidForMod] = modEntityId;
+                await ResolveAllFilesInModPage(uidForMod, tx, modEntityId, CancellationToken.None);
             }
 
             var fileEntityId = file.Resolve(db, tx, modEntityId);

src/Networking/NexusMods.Networking.NexusWebApi/NexusModsLibrary.cs

@@ -74,6 +74,14 @@ public NexusModsLibrary(IServiceProvider serviceProvider)
         foreach (var node in modInfo.Data!.LegacyMods.Nodes)
             first = node.Resolve(_connection.Db, tx);
 
+        await ResolveAllFilesInModPage(uid, tx, first, cancellationToken);
+
+        var txResults = await tx.Commit();
+        return NexusModsModPageMetadata.Load(txResults.Db, txResults[first]);
+    }
+
+    private async Task ResolveAllFilesInModPage(UidForMod uid, ITransaction tx, EntityId modPageId, CancellationToken cancellationToken)
+    {
         // Note(sewer):
         // Make sure to also fetch all files on the mod page.
         // The update code refreshes file info only on changes of the mod page.
@@ -85,10 +93,7 @@ public NexusModsLibrary(IServiceProvider serviceProvider)
         var filesByUid = await _gqlClient.ModFiles.ExecuteAsync(modIdString, gameIdString, cancellationToken);
         filesByUid.EnsureNoErrors();
         foreach (var node in filesByUid.Data!.ModFiles)
-            node.Resolve(_connection.Db, tx, first);
-
-        var txResults = await tx.Commit();
-        return NexusModsModPageMetadata.Load(txResults.Db, txResults[first]);
+            node.Resolve(_connection.Db, tx, modPageId);
     }
 
     public async Task<NexusModsFileMetadata.ReadOnly> GetOrAddFile(