OAuth migration dashboard; Austria/Finland added; React 19 support ships

• Released new migrations page on Dashboard for OAuth migration tracking.
• Added support for Austria and Finland.
• Added USER_PERMISSION_REVOKED webhook support for American Express.

For Layer:

• Added Layer session configuration in Dashboard; moved user_id into user object; released React Native SDK 12.1.1 with destroy() method.

For Link:

• Released React SDK 4.0.1 with React 19 support.
• Webview-based integration modes no longer allowed for new customers.
• Announced combined phone/consent pane for returning user experience.

For Plaid Check Consumer Report:

• Expanded Silent Network Authentication (SNA) support; date of birth now required for user identity; added warnings field to Income/Network/Partner Insights responses; phone pre-fill from consumer_report_user_identity; new opt-in toggle for faster future report sharing.

For Signal:

• Added triggered_rule_details to /signal/evaluate response.

For Transactions:

• Updated /processor/transactions/sync schema to allow null account objects.