feat: add fetched-at timestamp to markdown header and json meta

src/lib.rs

@@ -1,6 +1,7 @@
 use std::env;
 use std::path::Path;
 
+use chrono::Utc;
 use clap::Parser;
 
 pub mod cli;
@@ -35,7 +36,8 @@ pub fn run() -> anyhow::Result<()> {
 
             let client = GiteaClient::new(base_url, token);
             let bundle = client.fetch_pr_bundle(&repo, args.pr_index)?;
-            let doc = normalize_bundle(&repo, bundle);
+            let fetched_at = Utc::now().to_rfc3339();
+            let doc = normalize_bundle(&repo, fetched_at, bundle);
 
             let rendered = match args.format {
                 OutputFormat::Markdown => render_markdown(&doc),

src/model.rs

@@ -15,6 +15,7 @@ pub struct PrMeta {
     pub pr_index: i64,
     pub title: String,
     pub description: Option<String>,
+    pub fetched_at: Option<String>,
     pub state: String,
     pub author: String,
     pub base_branch: String,

src/normalize.rs

@@ -9,7 +9,7 @@ use crate::model::{
     ReviewItem,
 };
 
-pub fn normalize_bundle(repo: &str, bundle: PullBundleDto) -> PrReviewDocument {
+pub fn normalize_bundle(repo: &str, fetched_at: String, bundle: PullBundleDto) -> PrReviewDocument {
     let PullBundleDto {
         pull,
         reviews,
@@ -33,6 +33,7 @@ pub fn normalize_bundle(repo: &str, bundle: PullBundleDto) -> PrReviewDocument {
             pr_index: pull.number,
             title: pull.title,
             description: pull.body,
+            fetched_at: Some(fetched_at),
             state: pull.state,
             author: pull.user.login,
             base_branch: pull.base.ref_name,

src/render/markdown.rs

@@ -65,6 +65,8 @@ pub fn render_markdown(doc: &PrReviewDocument) -> String {
     out.push_str(
         "> 编号规则：Review `<pr>.<review>`；Comment `<pr>.<review>.<comment>`；Reply `<pr>.<review>.<comment>.<reply>`\n\n",
     );
+    let fetched_at = doc.meta.fetched_at.as_deref().unwrap_or("unknown");
+    out.push_str(&format!("> fetched at: {fetched_at}\n\n"));
     let pr_description = doc
         .meta
         .description