docs(code): add concise docstrings

src/gapido_auth/infrastructure/sms_ir_client.py

@@ -10,6 +10,8 @@ logger = logging.getLogger(__name__)
 
 
 class SmsIrSmsClient(SmsClient):
+    """SMS.ir verify API implementation of the SMS provider strategy."""
+
     _endpoint = "https://api.sms.ir/v1/send/verify"
 
     def __init__(
@@ -18,11 +20,14 @@ class SmsIrSmsClient(SmsClient):
         timeout_seconds: float = 10.0,
         transport: httpx.AsyncBaseTransport | None = None,
     ) -> None:
+        """Configure credentials, timeout, and optional test transport."""
         self._api_key = api_key
         self._timeout_seconds = timeout_seconds
         self._transport = transport
 
     async def send_otp(self, mobile: str, code: str, template: str) -> None:
+        """Send an OTP through SMS.ir using the configured verify template id."""
+
         headers = {
             "Content-Type": "application/json",
             "Accept": "application/json",
@@ -53,4 +58,3 @@ class SmsIrSmsClient(SmsClient):
             raise ExternalServiceError("SMS.ir API error")
 
         logger.info("OTP SMS sent successfully to mobile=%s via SMS.ir", mobile)
-