Merge branch 'v2/main' into v2/fix/tool-row-keys

Both sides added a showcase config row and section after the pagination
entry; kept both, structured output first.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HDdo1rNRVQnVRRdsqSrvG3

test-servers/configs/structured-output-http.json

@@ -0,0 +1,15 @@
+{
+  "serverInfo": {
+    "name": "structured-output-showcase",
+    "version": "1.0.0"
+  },
+  "tools": [
+    { "preset": "list_items" },
+    { "preset": "get_temp" },
+    { "preset": "echo" }
+  ],
+  "transport": {
+    "type": "streamable-http",
+    "port": 6601
+  }
+}