upgrade md message

Author: mateon01

.gitignore

@@ -45,9 +45,7 @@ yarn-error.log*
 .pnpm-store/
 
 # TypeScript build output
-*.js
 !jest.config.js
-!*.config.js
 *.d.ts
 *.js.map
 dist/
@@ -128,3 +126,4 @@ temp/
 
 # === Claude Code ===
 .claude/
+.mcp.json

opensearch/opensearch_ubi/README.md

@@ -1,6 +1,6 @@
 # UBI-LTR Pipeline - AWS CDK Infrastructure
 
-This CDK project provisions the complete AWS infrastructure for the User Behavior Insights (UBI) to Learning to Rank (LTR) pipeline.
+This CDK project provisions the complete AWS infrastructure for the User Behavior Insights (UBI) to Learning to Rank (LTR) pipeline. (This is a demo sample for reference purposes.)
 
 ## Architecture Overview