fix: hubspot attribution issues

[Zaimwa9]

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• [ ] I have added information to docs/ if required so people know about the feature!
• [x] I have filled in the "Changes" section below?
• [x] I have filled in the "How did you test this code" section below?
• [x] I have used a Conventional Commit title for this Pull Request

Changes

⚠️ Hubspot is now in charge of initially creating (if not exists) / associating organisation with users. Reconciliation is based on domain.

• Pass hubspot cookie from frontend on signup action
• Reworked the hubspot tracking flow so that:

1. Every new sign-up creates a hubspot contact (using create_lead_form with or without cookie) and saves HubspotLeads
2. On UsersOrganisation creation a) If organisation was just created and exists in hubspot => get company data from hubspot, saves the HubspotOrganisation object with correct id b) if doesn't exist in hubspot for X reason => creates it and saves hubspot ID
3. On UsersOrganisation creation, associates the contact with the

• Removed the 30min background checker as hubspot creates/associates automatically the company

How did you test this code?

Please describe.

• Added battery of tests on client and lead_tracker Functionally: Set "ENABLE_HUBSPOT_LEAD_TRACKING": "True" and HUBSPOT_ACCESS_TOKEN Create user, organisation, invite users

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Docker builds report

Image	Build Status	Security report
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ghcr.io/flagsmith/flagsmith-e2e:pr-5560	Finished :white_check_mark:	Skipped
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ghcr.io/flagsmith/flagsmith-frontend:pr-5560	Finished :white_check_mark:	Results :white_check_mark:

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.76%. Comparing base (23aa20f) to head (3d84158). Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5560      +/-   ##
==========================================
+ Coverage   97.74%   97.76%   +0.02%     
==========================================
  Files        1255     1255              
  Lines       44500    44643     +143     
==========================================
+ Hits        43496    43645     +149     
+ Misses       1004      998       -6     

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[Zaimwa9]

Thanks for the detailed feedback.

The naming could definitely be improved in a few places

Definitely, let me know if this feels clearer

As far as I'm aware, this work should ideally have resulted in 3 tasks

That should be the case, more precisely there are 2 entrypoints:

1. User registration triggers create_hubspot_contact_for_user and ultimately the lead_form
2. New UserOrganisation entity triggers track_hubspot_user_organisation_association that wraps update_company if name needs to be updated (merged with update subscription)

Additionally, I added a basic retry with backoff in create_lead_form, without raising for now