fix(project): await git id cache write (#14977)

packages/opencode/src/project/project.ts

@@ -138,7 +138,7 @@ export namespace Project {
 
           id = roots[0]
           if (id) {
-            void Filesystem.write(path.join(dotgit, "opencode"), id).catch(() => undefined)
+            await Filesystem.write(path.join(dotgit, "opencode"), id).catch(() => undefined)
           }
         }