Fix create_note_from_template MCP tool: post templateName/notePath

The MCP client posted template/path, but /api/templates/create-note reads
templateName/notePath, so every call failed with
"HTTP 400: Template name and note path required" before the template was
ever loaded. Send the keys the endpoint expects.

mcp_server/client.py

@@ -254,9 +254,10 @@ class NoteDiscoveryClient:
         Returns:
             APIResponse with creation result
         """
+        # The /api/templates/create-note endpoint reads `templateName` and `notePath`.
         data = {
-            "template": template_name,
-            "path": note_path,
+            "templateName": template_name,
+            "notePath": note_path,
         }
         if variables:
             data["variables"] = variables