Move SSL setup to initGui() and log errors instead of silencing them

- Remove the module-level setup_qgis_ssl_for_mergin_client() call;
  the auth manager is not guaranteed to be ready at import time
- In initGui(), replace bare except Exception: pass with a logged
  warning so SSL setup failures are visible in the QGIS message log

Author: lleirborras

Mergin/plugin.py

@@ -65,14 +65,6 @@
 MERGIN_CLIENT_LOG = os.path.join(QgsApplication.qgisSettingsDirPath(), "mergin-client-log.txt")
 os.environ["MERGIN_CLIENT_LOG"] = MERGIN_CLIENT_LOG
 
-try:
-    # Best-effort early init; auth manager may not be ready yet so this may be a no-op.
-    # The real call happens in initGui() and before each MerginClient creation.
-    setup_qgis_ssl_for_mergin_client()
-except Exception:
-    pass
-
-
 class MerginPlugin:
     def __init__(self, iface):
         self.iface = iface
@@ -123,8 +115,8 @@ def initGui(self):
 
         try:
             setup_qgis_ssl_for_mergin_client()
-        except Exception:
-            pass
+        except Exception as e:
+            QgsApplication.messageLog().logMessage(f"Mergin Maps plugin: failed to set up SSL certificates: {e}")
 
         if self.iface is not None:
             self.add_action(