LCORE-1092: Better docstring for Uvicorn runner

Author: tisnik

src/runners/uvicorn.py

@@ -10,7 +10,15 @@
 
 
 def start_uvicorn(configuration: ServiceConfiguration) -> None:
-    """Start Uvicorn-based REST API service."""
+    """
+    Start the Uvicorn server using the provided service configuration.
+
+    Parameters:
+        configuration (ServiceConfiguration): Configuration providing host,
+        port, workers, and `tls_config` (including `tls_key_path`,
+        `tls_certificate_path`, and `tls_key_password`). TLS fields may be None
+        and will be forwarded to uvicorn.run as provided.
+    """
     logger.info("Starting Uvicorn")
 
     log_level = logging.INFO