Stricter throttler options for hubspot

[epipav]

Changes proposed ✍️

What

🤖 Generated by Copilot at 97c3f74

Reduced the concurrency limit of the RequestThrottler for the Hubspot integration to avoid API rate limit errors. This improves the reliability and performance of the data synchronization between Crowd and Hubspot.
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🤖 Generated by Copilot at 97c3f74

RequestThrottler
Slows down to sync with Hubspot
Autumn leaves fall fast

Why

How

🤖 Generated by Copilot at 97c3f74

• Lowered the concurrent request limit for Hubspot API calls to avoid rate limit errors (link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screehshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.