fix: filter out empty strings handlers in participant matching

[zolfariot]

If any mail parsed by twenty has empty fields (for example To: or From:), an empty token is added to the search query for matching people in the CRM. If any entry in the CRM has an empty email field, all the emails with an empty token will be associated to that entry.

This modification filter empty tokens before matching..

[greptile-apps]

PR Summary

This PR fixes an issue where empty email fields in participant matching were causing incorrect associations in the CRM by filtering out empty handles before matching.

• Added filtering logic in packages/twenty-server/src/modules/match-participant/match-participant.service.ts to remove empty strings from handles before matching participants
• Prevents the system from incorrectly associating all emails with empty tokens to any CRM entry that has an empty email field
• Improves data integrity by ensuring only valid email addresses are used in the participant matching process
• Addresses a subtle but important edge case in the email parsing system that could lead to data corruption

Greptile AI

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[github-actions]

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