media: make all media direct downloadable

The only exception is emojis.

Also changed direct download encoding field names to be more generic
when used in mixed manner depending on peer type.

Direct downloads are still somewhat inefficient as they require an API
round trip to succeed but we can cache things in the database if needed.

pkg/connector/media/transfer.go

@@ -217,14 +217,14 @@ func (t *Transferer) WithPhoto(pc tg.PhotoClass) *ReadyTransferer {
 // WithUserPhoto transforms a [Transferer] to a [ReadyTransferer] by setting
 // the given user's photo as the location that will be downloaded by the
 // [ReadyTransferer].
-func (t *Transferer) WithUserPhoto(ctx context.Context, store *store.ScopedStore, user *tg.User, photoID int64) (*ReadyTransferer, error) {
-	if accessHash, err := store.GetAccessHash(ctx, ids.PeerTypeUser, user.GetID()); err != nil {
-		return nil, fmt.Errorf("failed to get user access hash for %d: %w", user.GetID(), err)
+func (t *Transferer) WithUserPhoto(ctx context.Context, store *store.ScopedStore, userID int64, photoID int64) (*ReadyTransferer, error) {
+	if accessHash, err := store.GetAccessHash(ctx, ids.PeerTypeUser, userID); err != nil {
+		return nil, fmt.Errorf("failed to get user access hash for %d: %w", userID, err)
 	} else {
 		return &ReadyTransferer{
 			inner: t,
 			loc: &tg.InputPeerPhotoFileLocation{
-				Peer:    &tg.InputPeerUser{UserID: user.GetID(), AccessHash: accessHash},
+				Peer:    &tg.InputPeerUser{UserID: userID, AccessHash: accessHash},
 				PhotoID: photoID,
 				Big:     true,
 			},
@@ -396,12 +396,12 @@ func (t *ReadyTransferer) DirectDownloadURL(ctx context.Context, loggedInUserID
 		return "", nil, err
 	}
 	mediaID, err := ids.DirectMediaInfo{
-		PeerType:        peerType,
-		ChatID:          chatID,
-		ReceiverID:      loggedInUserID,
-		MessageID:       int64(msgID),
-		Thumbnail:       thumbnail,
-		TelegramMediaID: telegramMediaID,
+		PeerType:  peerType,
+		PeerID:    chatID,
+		UserID:    loggedInUserID,
+		MessageID: int64(msgID),
+		Thumbnail: thumbnail,
+		ID:        telegramMediaID,
 	}.AsMediaID()
 	if err != nil {
 		return "", nil, err