docs(code): add concise docstrings

src/gapido_auth/infrastructure/sms_provider.py

@@ -12,6 +12,8 @@ def create_sms_client(
     transport: httpx.AsyncBaseTransport | None = None,
     debug_store: DebugSmsStore | None = None,
 ) -> SmsClient:
+    """Build the configured SMS provider strategy for the worker process."""
+
     match settings.sms_provider:
         case "kavenegar":
             return KavenegarSmsClient(settings.kavenegar_api_key, transport=transport)
@@ -24,6 +26,8 @@ def create_sms_client(
 
 
 def get_sms_template(settings: Settings) -> str:
+    """Return the provider-specific OTP template identifier used in queued SMS jobs."""
+
     match settings.sms_provider:
         case "kavenegar":
             return settings.kavenegar_login_template