fix(M10): defer modules.processing import in test_processing_runner (#28)

Quality tests fail during collection because test_processing_runner imports
modules.processing at module level, which triggers sd_samplers before
shared.opts is initialized. Defer import to inside test and add initialize
fixture so webui/opts are loaded first.

Made-with: Cursor

test/quality/test_processing_runner.py

@@ -1,10 +1,11 @@
 """Contract tests for ProcessingRunner (M10 runner skeleton)."""
-import modules.processing
 from modules.runtime.runner import ProcessingRunner, ProcessingRequest
 
 
-def test_processing_runner_delegates(monkeypatch):
+def test_processing_runner_delegates(monkeypatch, initialize):
     """ProcessingRunner.run delegates to process_images_inner."""
+    import modules.processing
+
     called = {}
 
     def fake_process_images_inner(p):