Module port 

Deterministic port calculation and environment variable key formatting.

Functions

calculate_effective_ports

Calculates effective ports: Effective Port = Base Port + Slot ID. Returns a map of environment key -> effective port, or PortError on overflow.

format_port_env_key

Converts a port key name to an uppercase environment variable name.

is_shared_service_port

Returns true if a port key represents a client connection to a shared service.