EPIC: Block verification before saving (only block stream hash verification)

[a-saksena]

AS A Block Node developer
I WANT TO compare a Block Hash (before proofs are available) in Block Stream
SO THAT I continue development alongside TSS

Tech Notes:

1. Using Block Stream Simulator (from Services)
2. We will store a Block unverified and delete it if info in the next block fails its verification.
3. Compute the 4 hashes, but not store them.
4. The hash calculation and signature process are documented in Notion.

Note: No TSS usage. This simply verifies the hashes match in the interim

Tasks

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1. Design Doc for Verification Implementation #383
   Block Node Design +2
   
2. Include necessary Libraries from Platform-SDK #375
   Block Node New Feature +2
   
3. Create a Verification Handler VerificationHandler #374
   Block Node New Feature +2
   
4. BlockHashingService Interface and Implementation #376
   Block Node +1
   
5. BlockVerificationSession #424
   Block Node New Feature +2
   
6. Verify block hashes #173
   Block Node +1
   
7. Metrics and Dashboard for Verification Feature #423
   Block Node +1
   
8. Test block verification using Simulator data (negative test) #174
   Tests +1
9. Test block verification using Simulator data (happy path tests) #175
   Tests +1
10. Design the Block Merkle Tree to use BlockItemUnparsed and hash in the appropriate subtree (task moved from EPIC: Optimize Block Stream processing #329)