fix(onboarding): Onboarding marker PUT too restrictive

[khvn26]

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• I have added information to docs/ if required so people know about the feature.
• I have filled in the "Changes" section below.
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Changes

Chances that someone onboards via an old/custom SDK are low, but not zero.

How did you test this code?

N/A

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3 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs	Ignored		Jul 24, 2026 11:43am
flagsmith-frontend-preview	Ignored		Jul 24, 2026 11:43am
flagsmith-frontend-staging	Ignored		Jul 24, 2026 11:43am

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 538bac4d-2ac7-4752-b3d4-f89540282929

📥 Commits

Reviewing files that changed from the base of the PR and between 5e2c954 and 9e7dbd0.

📒 Files selected for processing (1)

• api/environments/onboarding/serializers.py

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📝 Walkthrough

Walkthrough

The onboarding status update serializer extends the first_evaluated_sdk_label ChoiceField to accept "unknown" in addition to values derived from KnownSDK.

Estimated code review effort: 1 (Trivial) | ~2 minutes

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[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-8097	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-8097	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-8097	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api:pr-8097	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-8097	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-8097	Finished ✅	Results ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.69%. Comparing base (e97cef6) to head (9e7dbd0).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8097   +/-   ##
=======================================
  Coverage   98.69%   98.69%           
=======================================
  Files        1525     1525           
  Lines       60605    60605           
=======================================
  Hits        59817    59817           
  Misses        788      788           

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[github-actions]

✅ private-cloud · depot-ubuntu-latest-16 — run #18700 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-16)

 2 passed

Details

 2 tests across 2 suites
 48.8 seconds
 9e7dbd0
 🔄 Run: #18700 (attempt 1)

🗂️ Previous results

✅ private-cloud · depot-ubuntu-latest-arm-16 — run #18700 (attempt 1)

Playwright Test Results (private-cloud - depot-ubuntu-latest-arm-16)

 2 passed

Details

 2 tests across 2 suites
 38.8 seconds
 9e7dbd0
 🔄 Run: #18700 (attempt 1)

✅ oss · depot-ubuntu-latest-arm-16 — run #18700 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-arm-16)

 1 passed

Details

 1 test across 1 suite
 42.6 seconds
 9e7dbd0
 🔄 Run: #18700 (attempt 1)

✅ oss · depot-ubuntu-latest-16 — run #18700 (attempt 1)

Playwright Test Results (oss - depot-ubuntu-latest-16)

 1 passed

Details

 1 test across 1 suite
 34.4 seconds
 9e7dbd0
 🔄 Run: #18700 (attempt 1)

[github-actions]

Visual Regression

19 screenshots compared. See report for details.
View full report