metadata: handle empty trailer_uri for shows

[eladyn]

I stumbled across a show, which has an empty trailer_uri. In particular, the trailer_uri field on the librespot_protocol::metadata::Show struct was Some(""), which led to the SpotifyId::from_uri parsing to fail.

This patch accounts for this possibility. Another option would of course be to just use String for that field, to avoid any parsing problems.

Example:

previously, doing Show::get(&session, &id).await yielded for spotify:show:28sR8OiOq0MMnGEzMJTXSt:

Error { kind: InvalidArgument, error: InvalidFormat }

With this, it returns:

Show {
    id: SpotifyId(
        "spotify:show:28sR8OiOq0MMnGEzMJTXSt",
    ),
    name: "1,5 Grad – der Klima-Podcast mit Luisa Neubauer",
    description: "Die Klimakrise ist hier. Wir haben alle Fakten, die wir brauchen, um gegen sie anzukämpfen. In Deutschland haben wir dafür sogar politische Mehrheiten. Wie kommen wir als Gesellschaft endlich ins Handeln? Im Spotify-Original Podcast “1,5 Grad” gibt Luisa Neubauer Antworten auf diese Frage. Sie gewährt Einblicke hinter die Kulissen ihres Aktivistinnen-Lebens und beleuchtet die Klimadiskussion mit ihren Gästen aus neuen Blickwinkeln. Für sie ist klar: Veränderung findet bereits statt, Quellen für Hoffnung gibt es überall. Jetzt liegt es an uns allen, den Wandel mit anzuschieben. \"1,5 Grad\" - der Klima-Podcast mit Luisa Neubauer, nur auf Spotify.",
    publisher: "Spotify & Luisa Neubauer",
    language: "de",
    is_explicit: false,
    covers: Images(
        [
            Image {
                id: FileId(
                    Ok(
                        "ab6765630000f68da378a43d00eddbb41f2f4c70",
                    ),
                ),
                size: SMALL,
                width: 64,
                height: 64,
            },
            Image {
                id: FileId(
                    Ok(
                        "ab67656300005f1fa378a43d00eddbb41f2f4c70",
                    ),
                ),
                size: DEFAULT,
                width: 300,
                height: 300,
            },
            Image {
                id: FileId(
                    Ok(
                        "ab6765630000ba8aa378a43d00eddbb41f2f4c70",
                    ),
                ),
                size: LARGE,
                width: 640,
                height: 640,
            },
        ],
    ),
    episodes: Episodes(
        [
            SpotifyId(
                "spotify:episode:2yJRySMdJa0IJyhiQt2KYe",
            ),
            SpotifyId(
                "spotify:episode:5keKoTZNooaeKboKsfuZNk",
            ),
            SpotifyId(
                "spotify:episode:09rvishjEfUJ3MxEZj6tO9",
            ),
            SpotifyId(
                "spotify:episode:2SgffAMDaqFuPmpc9QihBP",
            ),
            SpotifyId(
                "spotify:episode:4COEXOhmcH83gW2mVwxQOl",
            ),
            SpotifyId(
                "spotify:episode:1Uk9wVHzBJ1O8R1ale0zaV",
            ),
            SpotifyId(
                "spotify:episode:1LmstLMvSj9EuvziJc0cov",
            ),
            SpotifyId(
                "spotify:episode:5zzZdUXuMsnctu9Pz5G05u",
            ),
            SpotifyId(
                "spotify:episode:7FMbTNlH5XNzUcXvTnYh16",
            ),
            SpotifyId(
                "spotify:episode:6xHOj0wQFtGUK2SGSXjzKB",
            ),
            SpotifyId(
                "spotify:episode:2A1evUit45oQb65OWT6P8b",
            ),
            SpotifyId(
                "spotify:episode:5nXD7kVMvfwh0M2piTc0WJ",
            ),
            SpotifyId(
                "spotify:episode:0PsAw06YY8FuUspnCZS7nD",
            ),
            SpotifyId(
                "spotify:episode:1y7uYvJ9TPJVKxLnYN6Ror",
            ),
            SpotifyId(
                "spotify:episode:3vCNeuiYXmz2nWZYnbPND7",
            ),
            SpotifyId(
                "spotify:episode:2onaNST6VMOR3Tqyh40X8j",
            ),
            SpotifyId(
                "spotify:episode:1x6ripc5R6YgQFU9ViUzJI",
            ),
            SpotifyId(
                "spotify:episode:3KMAxjwnQ4zx2Z8dQjl70t",
            ),
            SpotifyId(
                "spotify:episode:6asAmilWvDl8PXjr3IIOnX",
            ),
            SpotifyId(
                "spotify:episode:1ymuViiEonDfMAWRjaaN1T",
            ),
            SpotifyId(
                "spotify:episode:39KFKqoDk4TuXlX9rKoWLS",
            ),
            SpotifyId(
                "spotify:episode:1qSu2efACZAxWuXDoeQaXh",
            ),
            SpotifyId(
                "spotify:episode:5vWMPof2Jb2iFNTlyigIcz",
            ),
            SpotifyId(
                "spotify:episode:7fzqrKo2HeIRfQQ9gtXbeX",
            ),
            SpotifyId(
                "spotify:episode:2EAt05dQh3p8GqeRdqWuxZ",
            ),
            SpotifyId(
                "spotify:episode:2OL68dHC8PtnSENJZuhUYT",
            ),
            SpotifyId(
                "spotify:episode:4hOrkGiMX87T2PWQ82KyTz",
            ),
            SpotifyId(
                "spotify:episode:3Ocm2w0et8jTk8zIrtKT2V",
            ),
            SpotifyId(
                "spotify:episode:34G1AB7LhH2CDj53TbgKlq",
            ),
            SpotifyId(
                "spotify:episode:4jtZGkwKDTgGm0omX3RImR",
            ),
            SpotifyId(
                "spotify:episode:1nJTLeXwgHCKH4Md82AlfX",
            ),
            SpotifyId(
                "spotify:episode:6u8PhdmS8mjxH6Ki67y8n4",
            ),
            SpotifyId(
                "spotify:episode:7dRCQTIDrTLLKMeiPNFTOm",
            ),
            SpotifyId(
                "spotify:episode:6544sUNuxTD0vaJ67qgop7",
            ),
            SpotifyId(
                "spotify:episode:220LAEscnWZ8PpY3CxwX8A",
            ),
            SpotifyId(
                "spotify:episode:7kPNMpbzl5m63DDEqChGmq",
            ),
            SpotifyId(
                "spotify:episode:4zO0xIqBlvG9BSO5ZFBNvL",
            ),
            SpotifyId(
                "spotify:episode:6rOdBsMjRc6jz46inwx7Hp",
            ),
            SpotifyId(
                "spotify:episode:274Faf5SUiQRe9wIefAmxJ",
            ),
            SpotifyId(
                "spotify:episode:7baOTUE0lzsxtTAqWCwrh3",
            ),
            SpotifyId(
                "spotify:episode:2f4Q1eGIlOiUs0GAy6uioj",
            ),
        ],
    ),
    copyrights: Copyrights(
        [],
    ),
    restrictions: Restrictions(
        [
            Restriction {
                catalogues: RestrictionCatalogues(
                    [],
                ),
                restriction_type: STREAMING,
                catalogue_strs: [
                    "all",
                    "free",
                    "premium",
                    "shuffle",
                    "commercial",
                ],
                countries_allowed: None,
                countries_forbidden: Some(
                    [],
                ),
            },
        ],
    ),
    keywords: [],
    media_type: AUDIO,
    consumption_order: EPISODIC,
    availability: Availabilities(
        [],
    ),
    trailer_uri: None,
    has_music_and_talk: false,
    is_audiobook: false,
}

[photovoltex]

Thanks for the fix. Would you add a CHANGELOG entry?