feat: add tuning handler

[khullarpulkit15]

Changes

In the PR have tried to add a new handler for catching Tuning contract events separately and store them in database.
Complete feature require to capture 2 events, Initiate & Execute.

This PR only contains the changes to handle Execute event and is still under testing.

JIRA for this PR.

Completed?

• Yes
• No

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Code Review Checklist (to be filled out by reviewer)

• Description accurately reflects what changes are being made.
• Either the PR references an issue (via the "Development" combobox) or the description explains the need for the changes.
• The PR appropriately sized.
• The PR contains an idempotent DB migration.
• I have verified the correctness of the DB migration using relevant data (e.g. test-generated data).
• New code has enough tests.
• New code has enough documentation to answer "how do I use it?" and "what does it do?".
• Existing documentation is up-to-date, if impacted.