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Kevin Zhang
100e95a098
Adds `SAPODataConnector`, `SAPODataEntity`, and `SAPIngestor` for ingesting master and transactional data from SAP OData services, mainly things like Business Partners and Sales Orders. Tested around S/4HANA Cloud, SuccessFactors, and on-prem NetWeaver Gateway style OData endpoints. Main pieces included: * OAuth2 client credentials and Basic auth support. Both go through the existing `ssrf.py` checks, including the OAuth token request. * Small EDMX parser used by `discover_service()` so we don't need to pull in `pyodata`. * Server-side pagination support for both OData versions: * v2: `__next`, including plain string and `__deferred` formats * v4: `@odata.nextLink` * Keeps the service path in the base URL correctly whether the URL has a trailing slash or not. This is normalized in `SAPIngestor.__init__`. * Adds an `ingest-sap` extra with just `requests`, so there is no SAP/proprietary SDK dependency. This is meant to be a fairly small first version of the connector without adding a lot of SAP-specific dependencies. Closes #1228