20260407 & 20260408 基于cir 三方replay对齐，并且materialize 使用hard link优化

src/fetch/rsync_system.rs

@@ -98,7 +98,8 @@ impl SystemRsyncFetcher {
     }
 
     fn module_fetch_uri(&self, rsync_base_uri: &str) -> String {
-        rsync_capture_scope_uri(rsync_base_uri).unwrap_or_else(|| normalize_rsync_base_uri(rsync_base_uri))
+        rsync_module_root_uri(rsync_base_uri)
+            .unwrap_or_else(|| normalize_rsync_base_uri(rsync_base_uri))
     }
 }
 
@@ -171,7 +172,7 @@ impl Drop for TempDir {
     }
 }
 
-fn rsync_capture_scope_uri(s: &str) -> Option<String> {
+fn rsync_module_root_uri(s: &str) -> Option<String> {
     let normalized = normalize_rsync_base_uri(s);
     let rest = normalized.strip_prefix("rsync://")?;
     let mut host_and_path = rest.splitn(2, '/');
@@ -181,10 +182,8 @@ fn rsync_capture_scope_uri(s: &str) -> Option<String> {
     if segments.is_empty() {
         return None;
     }
-    if segments.len() >= 4 {
-        segments.pop();
-    }
-    Some(format!("rsync://{authority}/{}/", segments.join("/")))
+    let module = segments.remove(0);
+    Some(format!("rsync://{authority}/{module}/"))
 }
 
 fn walk_dir_collect(
@@ -283,28 +282,28 @@ mod tests {
     }
 
     #[test]
-    fn rsync_capture_scope_uri_widens_only_deep_publication_points() {
+    fn rsync_module_root_uri_returns_host_and_module_only() {
         assert_eq!(
-            rsync_capture_scope_uri("rsync://example.net/repo/ta/ca/publication-point/"),
-            Some("rsync://example.net/repo/ta/ca/".to_string())
-        );
-        assert_eq!(
-            rsync_capture_scope_uri("rsync://example.net/repo/ta/"),
-            Some("rsync://example.net/repo/ta/".to_string())
-        );
-        assert_eq!(
-            rsync_capture_scope_uri("rsync://example.net/repo/"),
+            rsync_module_root_uri("rsync://example.net/repo/ta/ca/publication-point/"),
             Some("rsync://example.net/repo/".to_string())
         );
-        assert_eq!(rsync_capture_scope_uri("https://example.net/repo"), None);
+        assert_eq!(
+            rsync_module_root_uri("rsync://example.net/repo/ta/"),
+            Some("rsync://example.net/repo/".to_string())
+        );
+        assert_eq!(
+            rsync_module_root_uri("rsync://example.net/repo/"),
+            Some("rsync://example.net/repo/".to_string())
+        );
+        assert_eq!(rsync_module_root_uri("https://example.net/repo"), None);
     }
 
     #[test]
-    fn system_rsync_dedup_key_uses_capture_scope() {
+    fn system_rsync_dedup_key_uses_module_root() {
         let fetcher = SystemRsyncFetcher::new(SystemRsyncConfig::default());
         assert_eq!(
             fetcher.dedup_key("rsync://example.net/repo/ta/ca/publication-point/"),
-            "rsync://example.net/repo/ta/ca/"
+            "rsync://example.net/repo/"
         );
     }