Add new fields to PullRequests query

Closes #170
- Added new fields (specified in #170) to the `PullRequests` GraphQL query.
- Extended `GitHubPullRequests` to store the additional data.
- Implemented support for nested types like labels, comments, reviews,
  and commits.
- Derived `Serialize`/`Deserialize` for new types to enable database
  storage.

Author: jadenow

CHANGELOG.md

@@ -20,6 +20,8 @@ this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
   timestamps, and project-related metadata.
 - Exposed a new `discussions` query in the server’s GraphQL API to query the
   stored discussion data.
+- Added new fields to the `PullRequests` GraphQL query and corresponding fields to
+  the `graphql::pull_request::PullRequest` struct.
 
 ### Changed
 

src/database.rs

@@ -10,7 +10,7 @@ pub mod discussion;
 pub(crate) use discussion::DiscussionDbSchema;
 
 use crate::{
-    github::{GitHubIssue, GitHubPullRequests},
+    github::{GitHubIssue, GitHubPullRequestNode},
     graphql::{issue::Issue, pull_request::PullRequest},
 };
 
@@ -82,17 +82,13 @@ impl Database {
 
     pub(crate) fn insert_pull_requests(
         &self,
-        resp: Vec<GitHubPullRequests>,
+        resp: Vec<GitHubPullRequestNode>,
         owner: &str,
         name: &str,
     ) -> Result<()> {
         for item in resp {
             let keystr: String = format!("{owner}/{name}#{}", item.number);
-            Database::insert(
-                &keystr,
-                (&item.title, &item.assignees, &item.reviewers),
-                &self.pull_request_tree,
-            )?;
+            Database::insert(&keystr, &item, &self.pull_request_tree)?;
         }
         Ok(())
     }