fix: Do not add fnames to the sync trie when they have not been merged

[sanjayprabhu]

Motivation

We're thrashing the sync trie because we're constantly adding fnames that don't exist to the sync trie (and removing them when we detect and repair this)

Change Summary

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PR-Codex overview

Detailed summary

This PR focuses on fixing a bug related to merging username proofs in the mergeUserNameProof function. The notable changes include:

• Adding a check to not add fnames to the sync trie when they have not been merged
• Adding a test to ensure that a deleted fname is not added to the trie
• Adding a test to remove deleted fname proofs
• Adding a new event handler for MergeUsernameProofHubEvent
• Adding a test to check for successful merging of username proofs
• Adding tests for handling duplicates and replacing existing proofs with greater timestamps
• Adding tests for scenarios where there is no existing proof or the new proof is to fid 0

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🦋 Changeset detected

Latest commit: 58bef33

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@farcaster/hubble	Patch

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Name	Status	Preview	Comments	Updated (UTC)
hub-monorepo	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 9, 2024 11:42pm