Update mcp-api-gateway: bump pin and expose new configuration options

[rflpazini]

Summary

Updates the mcp-api-gateway server entry to reflect the major upstream refactor (rflpazini/mcp-api-gateway#1):

• Bump source.commit: f197f8db → d22011aa (2 new commits since the original pin)
• Expose new config env vars in the Toolkit UI so users can configure them without editing JSON manually:
  • API_1_BASE_URL — override the base URL from the spec
  • API_1_TOOL_MODE — individual or grouped (reduces a 1090-tool/2.2MB payload to 53 tools/184KB)
  • API_1_SCHEMA_MODE — full or compact (72% payload reduction)
  • API_1_PATH_PREFIX — comma-separated path prefixes to filter endpoints
  • API_1_TAGS — comma-separated OpenAPI tags to filter endpoints
  • API_1_TIMEOUT — request timeout in milliseconds
  • API_1_MAX_RETRIES — retry attempts for 429/5xx errors with exponential backoff
• Add parameter descriptions for all config fields
• Mark required fields (api_1_name, api_1_swagger_url)
• Update description to mention new capabilities (grouped tools, compact schemas, path filtering, cookie-based auth, retry with backoff)

What changed upstream

The upstream repo received a major refactor that:

• Split monolithic index.js into focused modules (config, schema-builder, api-registry, api-client, server)
• Fixed critical bugs ($ref resolution, tool name parsing)
• Added reliability features (timeout, retry with backoff, response size limits, health check)
• Introduced performance optimizations for large APIs (grouped tools, compact schemas, path/tag filtering)
• Upgraded to Node.js 24 LTS + distroless runtime image (0 vulnerabilities)
• Updated MCP SDK from 0.5.0 → 1.27.1
• Added 53 tests and CI test pipeline

Supersedes

This PR supersedes #2054 (automated pin bump) which only updates the commit hash without exposing the new configuration options.