🐛(back) add missing color option for project colors

[providenz]

Purpose

Backend only defined 9 project colors but the frontend expects 10

NB: an existing migration is edited (entry added to choices)

Summary by CodeRabbit

• Bug Fixes

  • Added a missing project color option that was previously unavailable to users.

• Tests

  • Added comprehensive test coverage for all project color options to ensure functionality.

[coderabbitai]

Walkthrough

This PR adds a new color option ("Color 10") to the ChatProject model by extending the ChatProjectColor enum, updating a Django migration, and adding a parametrized test to verify all project colors work correctly.

Changes

Cohort / File(s)	Summary
Documentation CHANGELOG.md	Added entry under [Unreleased] documenting the new color option fix.
Model Definitions src/backend/chat/models.py, src/backend/chat/migrations/0006_chatproject_chatconversation_project.py	Extended ChatProjectColor enum with COLOR_10 = "color_10" choice and updated migration's model field choices accordingly.
Test Coverage src/backend/chat/tests/views/projects/test_create.py	Added parametrized test test_create_project_with_each_color to verify the create endpoint accepts all ChatProjectColor values and persists them correctly.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: adding a missing 10th color option to the backend project colors to align with frontend expectations.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch providenz/add-missing-color

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@src/backend/chat/migrations/0006_chatproject_chatconversation_project.py`:
- Line 90: The migration 0006_chatproject_chatconversation_project.py was
modified to add the missing "color_10" choice in the CreateModel choices tuple,
but you must first verify this migration has not been applied anywhere; check
all environments (dev/staging/prod) for migration 0006 applied status and if it
has been applied, do NOT alter this migration file. If 0006 has been applied
anywhere, instead revert this change and create a new migration that uses
AlterField on the ChatProject/ChatConversation field (the field with the choices
tuple that previously missed "color_10") to add the missing choice; if 0006 has
not been applied anywhere, it's safe to keep the edited CreateModel choices
including ("color_10", "Color 10").

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: ec40ed46-77d0-4b73-8319-8c9e795c476d

📥 Commits

Reviewing files that changed from the base of the PR and between 6dd41e8 and 5207a94.

📒 Files selected for processing (4)

• CHANGELOG.md
• src/backend/chat/migrations/0006_chatproject_chatconversation_project.py
• src/backend/chat/models.py
• src/backend/chat/tests/views/projects/test_create.py

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[qbey]

I wonder if the number of colors should be a setting ? no need to change it, keep it simple for now