Fake deserializing >2**31 issue comment IDs

We have recently hit larger IDs in production, this tries to temporarily
work around that by making use of the negative ID space, hopefully
buying us a good chunk of time to make the larger change to switch to
2**64 IDs. Since the conversion is bidirectional, if not numeric value
preserving, it should hopefully be OK.

Author: Mark-Simulacrum

src/github/client.rs

@@ -208,7 +208,7 @@ impl Client {
     ) -> DashResult<CommentFromJson> {
         let url = format!(
             "{}/repos/{}/issues/comments/{}",
-            BASE_URL, repo, comment_num
+            BASE_URL, repo, comment_num as u32
         );
         let payload = serde_json::to_string(&btreemap!("body" => text))?;
         Ok(self.patch(&url, &payload)?.error_for_status()?.json()?)

src/github/models.rs

@@ -104,7 +104,7 @@ impl IssueFromJson {
 
 #[derive(Debug, Deserialize)]
 pub struct CommentFromJson {
-    pub id: i32,
+    pub id: u32,
     pub html_url: String,
     pub body: String,
     pub user: GitHubUser,
@@ -141,7 +141,7 @@ impl CommentFromJson {
             .first::<i32>(&*conn)?;
 
         Ok(IssueComment {
-            id: self.id,
+            id: self.id as i32,
             fk_issue: issue_id,
             fk_user: self.user.id,
             body: self.body.replace(0x00 as char, ""),