finish rust rewrite, add docker, drop python

crates/x-media/src/site/twitter/model.rs

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+use serde::Deserialize;
+
+/// Response shape of the syndication endpoint
+/// (`cdn.syndication.twimg.com/tweet-result`).
+#[derive(Deserialize, Debug)]
+pub struct SyndicationTweet {
+    pub id_str: String,
+    pub text: String,
+    pub user: SyndicationUser,
+    #[serde(default)]
+    pub possibly_sensitive: Option<bool>,
+    /// Visible-text span; the raw `text` field has the appended media short
+    /// link after it. Indices are UTF-16 code units.
+    #[serde(default, rename = "display_text_range")]
+    pub display_text_range: Option<[usize; 2]>,
+    #[serde(default)]
+    pub entities: SyndicationEntities,
+    #[serde(default, rename = "mediaDetails")]
+    pub media_details: Vec<SyndicationMedia>,
+}
+
+#[derive(Deserialize, Debug, Default)]
+pub struct SyndicationEntities {
+    #[serde(default)]
+    pub urls: Vec<SyndicationEntityUrl>,
+}
+
+/// A URL entity: `url` is the t.co short link as it appears in the text,
+/// `expanded_url` the real destination.
+#[derive(Deserialize, Debug)]
+pub struct SyndicationEntityUrl {
+    pub url: String,
+    #[serde(default)]
+    pub expanded_url: Option<String>,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct SyndicationUser {
+    pub name: String,
+    pub screen_name: String,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct SyndicationMedia {
+    #[serde(rename = "type")]
+    pub media_type: String,
+    pub media_url_https: String,
+    #[serde(default)]
+    pub video_info: Option<SyndicationVideoInfo>,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct SyndicationVideoInfo {
+    #[serde(default)]
+    pub variants: Vec<SyndicationVariant>,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct SyndicationVariant {
+    pub content_type: String,
+    pub url: String,
+}