fix(p10-1a-1): patch wire.rs Stats fixture for new schema fields

Task 16's new code_lang_breakdown / repo_breakdown fields broke the existing schema_wrapper_tags_schema_version test in wire.rs which constructs Stats { ... } literally. Use ..Default::default() since Stats now derives Default.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/kebab-cli/src/wire.rs

@@ -334,6 +334,8 @@ mod tests {
                 lang_breakdown: Default::default(),
                 index_bytes: Default::default(),
                 stale_doc_count: 0,
+                // p10-1A-1: new fields added to Stats; use Default for the test fixture.
+                ..Default::default()
             },
         };
         let v = wire_schema(&schema);