improve(telegram): cut cold channel setup import latency (#122955)

* perf(telegram): keep setup entry on light graph

* fix(plugin-sdk): complete private UI hint boundaries

scripts/lib/plugin-sdk-entrypoints.json

@@ -178,6 +178,7 @@
   "error-runtime",
   "extension-shared",
   "channel-config-helpers",
+  "channel-config-ui-hints",
   "channel-config-writes",
   "channel-config-primitives",
   "channel-config-schema",

scripts/lib/plugin-sdk-private-local-only-subpaths.json

@@ -17,6 +17,7 @@
   "browser-config",
   "bundled-channel-config-schema",
   "channel-activity-runtime",
+  "channel-config-ui-hints",
   "channel-config-writes",
   "channel-contract-testing",
   "channel-mention-gating",