Add MCP Observatory CI

[KryptosAI]

Add MCP Observatory CI

This adds a small MCP Observatory workflow for this MCP server.

Why it helps:

• verifies the MCP server starts and exposes its tool surface correctly
• catches schema drift and common security issues before release
• keeps the check local-first; no MCP Observatory account is required
• gives maintainers a PR-visible compatibility/security report

I validated the command locally with MCP Observatory before opening this PR:

npx @kryptosai/mcp-observatory test --security npx -y @browsermcp/mcp

Result: passed, with 12 tools discovered.

If this is too strict for the repo initially, the workflow can be adjusted while keeping the report visible.

[KryptosAI]

Small update: MCP Observatory v0.27.0 is now published with optional SARIF output and GitHub Code Scanning support.

This PR can remain a read-only advisory compatibility/security check, and if maintainers later want GitHub Security-tab findings, the workflow can opt into setup-ci --sarif with security-events: write.

Docs: https://github.com/KryptosAI/mcp-observatory/blob/main/docs/github-code-scanning-for-mcp.md