refactor: add diagnostic and error runtime sdk seams

scripts/lib/plugin-sdk-entrypoints.json

@@ -72,6 +72,7 @@
   "direct-dm",
   "deepseek",
   "device-bootstrap",
+  "diagnostic-runtime",
   "diagnostics-otel",
   "diffs",
   "discord",
@@ -82,6 +83,7 @@
   "discord-surface",
   "discord-thread-bindings",
   "discord-timeouts",
+  "error-runtime",
   "extension-shared",
   "channel-config-helpers",
   "channel-config-writes",