Add MCP_EXAMPLES.md with live benchmarks and head-to-head C vs Java comparison

New companion doc to Axis2/C MCP_EXAMPLES.md, showing identical financial
demos (stress-test, pre-trade risk, convergence) run against Axis2/Java on
WildFly 32. All curl commands have paired MCP stdio examples via the
axis2-mcp-bridge JAR. Includes full performance summary: Java is ~2x slower
on Monte Carlo, 2.8x on 500-asset PV, but produces identical financial
results. Transport/timing note clarifies server-side calcTimeUs measurement.

Also update jboss-deployment-structure.xml to dptv2 stable version (adds
jdk.net module dependency needed for Apache HttpClient5 on WildFly 32).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: robertlazarski