Client configuration schema and validation.

Uses NimbleOptions to validate all client options at creation time, providing clear error messages for invalid configuration.

Required Options

• :api_key - Your Stripe API key (sk_test_... or sk_live_...)
• :finch - Name of the Finch pool started in your supervision tree

Optional Options

See schema/0 for full option documentation with defaults.

Example

# In your application supervisor:
children = [
  {Finch, name: MyApp.Finch}
]

# Create a validated config:
{:ok, config} = LatticeStripe.Config.validate(
  api_key: "sk_test_...",
  finch: MyApp.Finch
)