fix: add missing port argument to open_project test calls

The merge of story-209 (positional path argument) added a port parameter
to open_project, but two test call sites were not updated.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/io/fs.rs

@@ -1088,6 +1088,7 @@ mod tests {
             project_dir.to_string_lossy().to_string(),
             &state,
             &store,
+            0,
         )
         .await
         .unwrap();
@@ -1111,6 +1112,7 @@ mod tests {
             project_dir.to_string_lossy().to_string(),
             &state,
             &store,
+            0,
         )
         .await
         .unwrap();