[backend] first chunk of draft MVP

[JeremyCloarec]

Proposed changes

Related issues

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[codecov]

Codecov Report

Attention: Patch coverage is 55.41237% with 173 lines in your changes missing coverage. Please review.

Project coverage is 66.17%. Comparing base (1aa3e4b) to head (6c7890b).
Report is 7 commits behind head on release/6.4.0.

Files with missing lines	Patch %	Lines
...ti-platform/opencti-graphql/src/database/engine.js	38.20%	110 Missing ⚠️
...ti-platform/opencti-graphql/src/http/httpServer.js	0.00%	12 Missing ⚠️
...rc/modules/draftWorkspace/draftWorkspace-domain.ts	74.46%	12 Missing ⚠️
...i-platform/opencti-graphql/src/config/providers.js	0.00%	10 Missing ⚠️
...latform/opencti-graphql/src/database/middleware.js	52.63%	9 Missing ⚠️
...modules/draftWorkspace/draftWorkspace-converter.ts	33.33%	6 Missing ⚠️
...atform/opencti-graphql/src/modules/ai/ai-domain.ts	0.00%	4 Missing ⚠️
...ti-platform/opencti-graphql/src/database/ai-llm.ts	0.00%	2 Missing ⚠️
...pencti-platform/opencti-graphql/src/domain/user.js	50.00%	2 Missing ⚠️
...-platform/opencti-graphql/src/http/httpPlatform.js	0.00%	2 Missing ⚠️
... and 3 more

Additional details and impacted files

@@                Coverage Diff                @@
##           release/6.4.0    #8418      +/-   ##
=================================================
- Coverage          66.21%   66.17%   -0.05%     
=================================================
  Files                597      604       +7     
  Lines              60422    60729     +307     
  Branches            6207     6232      +25     
=================================================
+ Hits               40011    40189     +178     
- Misses             20411    20540     +129     

Flag	Coverage Δ
	66.17% <55.41%> (-0.05%)	⬇️

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