When the MCP server returns a list where one entry cannot be deserialized
(e.g. a tool missing the required `name` field), the previous code called
`.unwrap_or_default()` on the whole-list deserialization, silently discarding
every valid entry in the page.
Switch all four discovery functions (tools, resources, resource-templates,
prompts) to iterate over the JSON array and deserialize each item
individually, skipping only those that fail. This ensures a single
non-conformant entry never hides the rest of the list.
Related: #1250
Vince
5d3ec1b439