Add base url prefix to Frames SDK for multi-region

[ghost]

Issue

PIMOB-4370

Proposed changes

Adds support for an optional baseURLPrefix to enable multi-region API routing by constructing prefixed API hosts (e.g. msdd.api.checkout.com) and plumbing that option through Frames UI components down into the core Checkout networking layer.

Changes:

Introduces baseURLPrefix into Frames configuration/models and forwards it into CheckoutAPIService.
Adds EnvironmentURLProvider to build prefixed base URLs (with trimming + fallback behavior) and updates request building to use it.
Updates Risk SDK dependency/imports to RiskSDK (and updates resolved package versions accordingly).

[Copilot]

Pull request overview

Adds support for an optional baseURLPrefix to enable multi-region API routing by constructing prefixed API hosts (e.g. msdd.api.checkout.com) and plumbing that option through Frames UI components down into the core Checkout networking layer.

Changes:

• Introduces baseURLPrefix into Frames configuration/models and forwards it into CheckoutAPIService.
• Adds EnvironmentURLProvider to build prefixed base URLs (with trimming + fallback behavior) and updates request building to use it.
• Updates Risk SDK dependency/imports to RiskSDK (and updates resolved package versions accordingly).

Reviewed changes

Copilot reviewed 20 out of 21 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
Tests/Mocks/StubCheckoutAPIService.swift	Updates mock initializer signature to match new API surface.
Source/UI/SecurityCodeComponent/SecurityCodeComponentConfiguration.swift	Adds baseURLPrefix to Security Code component configuration and documents behavior.
Source/UI/SecurityCodeComponent/SecurityCodeComponent.swift	Passes baseURLPrefix into CheckoutAPIService creation.
Source/UI/PaymentForm/Model/PaymentFormConfiguration.swift	Adds baseURLPrefix to payment form configuration and forwards it for API calls.
Source/UI/PaymentForm/Factory/PaymentFormFactory.swift	Wires baseURLPrefix into CheckoutAPIService for payment form flows.
Source/Core/CheckoutAPIService.swift	Extends Frames-layer CheckoutAPIService initializer/protocol to accept baseURLPrefix.
Package.swift	Bumps checkout-risk-sdk-ios dependency version.
Package.resolved	Updates locked revisions/versions for Risk SDK (and related resolved packages).
CheckoutTests/Stubs/StubRisk.swift	Updates test import to RiskSDK.
CheckoutTests/Stubs/StubBaseURLProvider.swift	Adjusts stub to conform to updated BaseURLProviding optional URL.
CheckoutTests/Model/EnvironmentTests.swift	Adds unit tests for prefixed/trimmed base URL generation.
Checkout/Source/Tokenisation/CheckoutAPIService.swift	Adds baseURLPrefix to initializer and uses EnvironmentURLProvider for request construction.
Checkout/Source/Network/RequestFactory.swift	Updates URL creation to handle optional base URL provider output.
Checkout/Source/Model/Environment.swift	Adds EnvironmentURLProvider and host-building logic for prefixed base URLs.

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