Default user ID resolver for BEAM transport.

Uses node-based identification for distributed systems.

Default user ID resolver for HTTP transport.

Extracts user ID from request context, headers, or session.

Default user ID resolver for stdio transport.

Uses system user or process-based identification.

@spec get_security_config() :: map()

Gets the current security configuration.

Merges application configuration with secure defaults and validates the result.

@spec get_transport_config(atom(), map()) :: map()

Gets security configuration for a specific transport.

Includes transport-specific settings and user ID resolution.

@spec validate_config(map()) :: {:ok, map()} | {:error, String.t()}

Validates security configuration.

Ensures all required fields are present and have valid values.