- Accept standard mcpServers item format (command/args/env/url/headers)
- Auto-infer connection type: command -> stdio, url -> http/sse
- Add PUT /bots/:bot_id/mcp/import for batch import from mcpServers dict
- Add GET /bots/:bot_id/mcp/export for standard format export
- Add UpsertMCPConnectionByName SQL for import upsert by name
- Preserve is_active state on import upsert