fix(storage): sync preserved recovery set on Windows

Author: ScriptedAlchemy

src/doctor/tests.rs

@@ -241,9 +241,11 @@ fn database_recovery_guidance_names_the_preserved_recovery_set() {
 
     let branch_db = PathBuf::from("/profile/projects/proj_test/branches/feature.db");
     let branch_guidance = database_recovery_guidance(&branch_db);
-    assert!(branch_guidance.contains("/profile/projects/proj_test/dirty"));
-    assert!(branch_guidance.contains("/profile/projects/proj_test/sessions.db"));
-    assert!(!branch_guidance.contains("/branches/sessions.db"));
+    let branches_root = branch_db.parent().unwrap();
+    let data_root = branches_root.parent().unwrap();
+    assert!(branch_guidance.contains(&data_root.join("dirty").display().to_string()));
+    assert!(branch_guidance.contains(&data_root.join("sessions.db").display().to_string()));
+    assert!(!branch_guidance.contains(&branches_root.join("sessions.db").display().to_string()));
 }
 
 #[tokio::test]

src/tracedecay/lifecycle.rs

@@ -1207,7 +1207,11 @@ fn preserve_corrupt_branch_store(store_layout: &StoreLayout, db_path: &Path) ->
                 ),
             });
         }
-        std::fs::File::open(&target)
+        // Windows `FlushFileBuffers` requires a write handle, so a read-only
+        // open would fail the durability sync with "access is denied".
+        std::fs::OpenOptions::new()
+            .write(true)
+            .open(&target)
             .and_then(|file| file.sync_all())
             .map_err(|error| TraceDecayError::Config {
                 message: format!(