Rename shared/logging/ to shared/log_config/ to avoid stdlib shadow

shared/logging/ shadows Python's stdlib logging module, causing a
circular import when any code does `import logging`. This breaks
both the entrypoint Redis flush and Hypercorn app loading.

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

infrastructure/factory.py

@@ -9,7 +9,7 @@ from quart import Quart, request, g, send_from_directory
 
 from shared.config import init_config, config, pretty
 from shared.models import KV  # ensure models imported
-from shared.logging import configure_logging
+from shared.log_config import configure_logging
 from shared.events import EventProcessor
 
 from shared.db.session import register_db