Register metadata and publish lineage for a custom data asset in OpenMetadata via the REST API

Steps

1. Obtain a JWT token by posting to POST /api/v1/users/login with admin credentials, or use a bot token configured under Settings > Bots in OpenMetadata; include the token in the Authorization: Bearer header on all subsequent calls
2. Create or look up the database service, database, and schema entities via POST /api/v1/services/databaseServices and related endpoints; OpenMetadata uses a hierarchical entity model where tables live under schemas under databases under services
3. Register or upsert a table entity via PUT /api/v1/tables with a payload containing the fully qualified name, columns with dataType entries, and optional tags; PUT behaves as an upsert so repeated calls update existing entities
4. Publish lineage by sending PUT /api/v1/lineage with an EntityLineage payload listing the 'edge' array, where each edge specifies fromEntity and toEntity objects by their id and type fields; column-level lineage is expressed in the lineageDetails.columnsLineage array within each edge
5. Verify the lineage was recorded by calling GET /api/v1/lineage/{entity}/{id}?upstreamDepth=2&downstreamDepth=2 and checking that the expected upstream and downstream nodes appear in the response