feat: Add Google Workspace user filtering and improve worker concurrency

[pcc2000]

Summary

• Google Workspace User Filtering: Added ability to archive only specific users instead of the entire domain by specifying allowed email addresses
• Worker Concurrency: Increased ingestion worker concurrency from 1 to 5 parallel jobs for faster processing
• Edit Form UX: Improved the ingestion source edit form to clearly indicate when credentials are hidden for security, with helpful placeholder text

Changes

Google Workspace User Filtering

• Added allowedUserEmails optional field to GoogleWorkspaceCredentials type
• Updated GoogleWorkspaceConnector.listAllUsers() to filter users based on the allowed list
• Added UI textarea field for entering allowed emails (one per line)
• If empty, archives all users (existing behavior preserved)

Worker Concurrency

• Increased BullMQ worker concurrency from 1 to 5 parallel jobs
• Allows multiple ingestion sources to sync simultaneously

Edit Form Improvements

• Shows notice when editing that credentials are hidden for security
• Placeholder text indicates fields are configured
• Only updates credentials if new values are provided

Test plan

• Create a Google Workspace ingestion with allowed user emails specified
• Verify only specified users are archived
• Verify empty allowed emails archives all users
• Test editing an ingestion source - credentials should show as hidden
• Verify multiple ingestion sources can sync in parallel

[github-actions]

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