feat: change MCP server protocol from streamable to stateless (#42)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: adityamparikh

src/main/resources/application-http.properties

@@ -1,6 +1,6 @@
 spring.main.web-application-type=servlet
 spring.ai.mcp.server.type=sync
-spring.ai.mcp.server.protocol=streamable
+spring.ai.mcp.server.protocol=stateless
 spring.ai.mcp.server.stdio=false
 # OAuth2 Security Configuration
 # Configure the issuer URI for your OAuth2 authorization server