Dynamic configs — `get_config`

A config is a typed remote-config value with targeting. Configs are not user-scoped, but get_config is exposed on the bound Client for one-stop ergonomics. After Shipeasy.configure, read it through the bound Shipeasy::Client.new(user).

# construct once per callsite (cheap; binds the user)
flags = Shipeasy::Client.new(current_user)

color = flags.get_config("button_color")          # raw value

Optional decode + default

The signature is get_config(name, decode = nil, default: nil):

• decode — an optional proc run on a present value to project it.
• default — returned when the config key is absent. The decode proc runs on a present value; it does not run on the default.

flags.get_config("button_color", default: "blue")

# Decode a nested field, with a fallback when the key is missing:
flags.get_config("limits", ->(v) { v["max"] }, default: 0)

The default is returned only when the config key is genuinely absent (or the client isn't ready) — not for a present value that happens to be falsy.