Refactor connections, remove Plaid, add view creation API

[jfrench9]

Summary

This PR refactors the connection subsystem by removing Plaid integration, streamlining the element mapping architecture, and introducing a new View creation API with supporting models. The changes simplify the SDK surface area while adding new view-building capabilities.

Key Accomplishments

Plaid Integration Removal

• Removed PlaidConnectionConfig model and all Plaid-specific references from connection-related files
• Cleaned up Plaid provider references from ConnectionProviderInfoProvider, CreateConnectionRequestProvider, and ListConnectionsProviderType0
• Simplified ConnectionResponse and CreateConnectionRequest models by removing Plaid-specific configuration branches
• Streamlined SecConnectionConfig model

Connection API Cleanup

• Removed unused functionality from create_connection, get_connection_options, and sync_connection API endpoints
• Simplified list_connections API

New View Creation API

• Added api/views/ module with a create_view endpoint
• Introduced new models: CreateViewRequest, ViewConfig, ViewAxisConfig, ViewAxisConfigElementLabelsType0, and ViewAxisConfigMemberLabelsType0
• Repurposed renamed Plaid model files into view axis config label types (leveraging similar structure)

Element Mapping Client Removal & View Builder Refactor

• Deleted element_mapping_client.py (585 lines removed) and removed its export from the extensions module
• Streamlined ViewBuilderClient by removing element mapping references, enhancing clarity of the view builder's responsibilities
• Updated SDK aliases in __init__.py to reflect the new module structure

Breaking Changes

⚠️ Breaking: The following removals will affect consumers of this SDK:

• PlaidConnectionConfig model has been removed — any code referencing Plaid connections will break
• ElementMappingClient extension has been deleted — consumers must migrate away from this client
• ViewBuilderClient API surface has changed — element mapping methods are no longer available through this client
• Connection API endpoints (create_connection, get_connection_options, sync_connection) have reduced functionality — callers passing Plaid-specific parameters will need to be updated
• SDK aliases in __init__.py have been refactored — import paths may need updating

Testing Notes

• Verify that existing connection workflows (non-Plaid providers) continue to function correctly with the simplified models
• Test the new create_view endpoint with various ViewConfig and ViewAxisConfig combinations
• Confirm that the ViewBuilderClient operates correctly without element mapping dependencies
• Validate that SecConnectionConfig changes are backward-compatible for existing SEC-based connections
• Check that all model serialization/deserialization works correctly for the new view-related models

Infrastructure Considerations

• Downstream services and consumers of this SDK should be updated to remove any Plaid-related references before adopting this version
• The new views API module requires corresponding backend endpoint availability — ensure the API server supports the create_view route before deployment
• Consider a coordinated release if other services depend on the removed ElementMappingClient functionality

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🤖 Generated with Claude Code

Branch Info:

• Source: feature/connection-improvements
• Target: main
• Type: feature

Co-Authored-By: Claude noreply@anthropic.com