style: apply ruff format across the repository

ruff format was never run repo-wide; CI now enforces 'ruff format --check', so normalize every module once. No behavior changes.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_sprint4_server.py

@@ -35,6 +35,7 @@ class _Ctx:
 
 # ── R20 — tool count comes from the public accessor and is a real number ─────
 
+
 async def test_registered_tool_count_is_positive_never_minus_one():
     import server
 
@@ -59,6 +60,7 @@ async def test_registered_tools_returns_objects_with_name_and_tags():
 
 # ── R15 — system_about tool_groups is dynamic + correct ──────────────────────
 
+
 async def test_system_about_includes_engineering_group(backend):
     import server
 
@@ -122,6 +124,7 @@ async def test_drawing_close_appears_in_groups(backend):
 
 # ── R20 — system_status reports a real tool_count, never -1 ──────────────────
 
+
 async def test_system_status_reports_real_tool_count(backend):
     import server
 
@@ -134,6 +137,7 @@ async def test_system_status_reports_real_tool_count(backend):
 
 # ── N8 — drawing_plan docstring corrected ────────────────────────────────────
 
+
 async def test_drawing_plan_docstring_not_misleading():
     import server