fix(config): suppress pyright call-arg for Settings() instantiation

pydantic-settings populates required fields from .env at runtime,
but pyright cannot infer this statically.

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

Author: ImTotem

src/bcsd_api/dependencies.py

@@ -14,7 +14,7 @@
 
 @lru_cache
 def get_settings() -> Settings:
-    return Settings()
+    return Settings()  # type: ignore[call-arg]
 
 
 @lru_cache