Modular Link support ended; PFCv2 ships with improved accuracy

For Link:

• Ended support for Modular Link (Europe-only).
• Improved returning user recognition on same device.

For Layer:

• Added SESSION_FINISHED webhook support.
• Added template improvements: required_if_supported_products, optional_products, additional_consented_products, custom preferred institutions list, SSN masking customization, account pre-selection criteria (closed beta).

For Transactions:

• Released Personal Finance Categories v2 (PFCv2) with ~10-20% categorization accuracy improvement and new granular schema for EWA use cases. Opt in via personal_finance_category_version=v2.