Add support for Secured Agents

[alexheifetz]

This pull request adds a new secured agent MCP server example to the examples-kotlin project, demonstrating OAuth2 JWT-based security for agent endpoints. It introduces a new MarketIntelligenceAgent with fine-grained authority requirements, provides a secure profile and configuration, and includes local JWT key generation and validation setup.

Security and configuration enhancements:

• Added a new Maven dependency on embabel-agent-mcp-security in examples-common/pom.xml to enable security features.
• Introduced a new Spring Boot profile constant SECURED_PROFILE in McpServers.kt for activating secured configuration.
• Added application-secured.yml with OAuth2 JWT resource server configuration, server port, and application metadata for the secured profile.

Secured agent server and agent implementation:

• Added KotlinAgentSecuredMcpServerApplication.kt, a new Spring Boot application entry point that runs the secured MCP server with Docker and JWT security profiles.
• Implemented MarketIntelligenceAgent.kt, a new agent requiring the market:admin authority, which produces structured market intelligence reports with a multi-step LLM pipeline and detailed data classes for report structure.

Local JWT key management and testing:

• Added a keys directory with instructions (README.txt) and a sample public key (public.pem) for local JWT validation; included a Python script (generate_token.py) to generate test JWTs using the private key. [1] [2] [3]

Build configuration:

• Added a new Maven profile enable-secured-agent-mcp-server in examples-kotlin/pom.xml to build and run the secured agent server example, including required dependencies and main class setup.