Resolves Add telemetry for embedded database#327

[apoorv-2204]

Description

Add telemetry at Methods under

• ChainWriter
  • get_transaction
  • get_transaction_chain
• Chain Reader
  • index_transaction
  • write_transacton
    Resolves # (Add telemetry for embedded database #327 )

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• visit localhost/metrics to see exported telemetry

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[blackode]

• Read PR description
• Read AC
• Pulled branch, manually tested, verified AC are met
• Reviewed the code
• Metrics shown /metrics