Matt Matravers

docs(rfc): Serialising GMS Updates with Preconditions

2

## Checklist - [x] The PR conforms to DataHub's [Contributing Guideline](https://github.com/datahub-project/datahub/blob/master/docs/CONTRIBUTING.md) (particularly [Commit Message Format](https://github.com/datahub-project/datahub/blob/master/docs/CONTRIBUTING.md#commit-message-format)) - [x] Links to related issues (if applicable)

**Describe the bug** DataHub is not fully integrated with Neo4j as it does not support multi-hop queries. We need an implementation of getLineage for Neo4jGraphService, and then we can also...