Create Ramp Data Connector

Build data connector to fetch transaction data from Ramp API.

• Connect to Ramp API using stored OAuth credentials
• Fetch credit card transactions with pagination support
• Map Ramp transaction schema to internal data model
• Handle API rate limits and error responses
• Support incremental sync (fetch only new/updated transactions)

Open questions:

• What transaction fields are needed from Ramp?
• How far back should historical data be imported on initial sync?