fix: add configurable HTTP request timeout (default 30s)

The SDK's _request() method called session.request() without any timeout
parameter, causing all HTTP calls to block indefinitely if the API server
is slow or unresponsive. This could exhaust worker threads in consuming
applications and halt payment processing.

Added a configurable 'timeout' constructor parameter (default 30s) that
is passed to every requests.Session.request() call.

Co-authored-by: Babacar Diop <princemuichkine@users.noreply.github.com>

Author: cursoragent

lomi/client.py

@@ -19,13 +19,17 @@ def _flatten_data(data):
 class LomiClient:
     """Merchant API client (public routes only)."""
 
+    DEFAULT_TIMEOUT = 30
+
     def __init__(
         self,
         api_key: str,
         base_url: str = "https://api.lomi.africa",
         environment: str = "live",
+        timeout: Optional[int] = None,
     ):
         self.api_key = api_key
+        self.timeout = timeout if timeout is not None else self.DEFAULT_TIMEOUT
         test_host = environment in ("test", "sandbox") or (
             isinstance(environment, str) and environment.lower() == "test"
         )
@@ -70,6 +74,7 @@ def _request(
                 url=url,
                 params=params,
                 json=json_data,
+                timeout=self.timeout,
             )
 
             if response.status_code == 401: