fix: revert dagger engine version to official v0.19.11

The patched version v0.19.11-patched-ts-sdk doesn't exist on dl.dagger.io
or GitHub releases, causing CI to fail at the install step.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: claude

dagger.json

@@ -1,6 +1,6 @@
 {
   "name": "monorepo",
-  "engineVersion": "v0.19.11-patched-ts-sdk",
+  "engineVersion": "v0.19.11",
   "sdk": {
     "source": "typescript"
   },