GraphQL block API

[steven-sheehy]

Problem

As a consumer of the mirror node GraphQL API, I'd like to be able to get information about a specific block.

Solution

Implements the block query. Reference the blocks get by ID REST API for relevant queries.

Tasks

Beta Give feedback

1. Copy relevant schema over from HIP excluding transactions connection
2. Add a BlockController and test
3. Add a BlockService and test
4. Add a RecordFileRepository and test
5. Support query by hash
6. Support query by number
7. Support query by BlockType
8. Support enum field parameters
9. Create a BlockMapper and test that maps all scalar fields
10. Add smoke test to postman.json that looks for latest block

Alternatives

No response