fix(LaunchDarkly importer): Update API version to 20240415

[Zaimwa9]

Thanks for submitting a PR! Please check the boxes below:

• I have read the Contributing Guide.
• I have added information to docs/ if required so people know about the feature.
• I have filled in the "Changes" section below.
• I have filled in the "How did you test this code" section below.

Closes #6476

We migrate from LD API versions from 20220603 to 20240415
Main differences:

• GET /api/v2/flags/{projectKey} max limit reduced from 1000 to 100
• environments are only returned when explicitly filtering by env query param (returned by default before)
• Related to the above, we have max 3 envs in query per request

Changes

• Updated LAUNCH_DARKLY_API_VERSION to 20240415
• Added constant for flags limit LAUNCH_DARKLY_API_FLAGS_LIMIT_PER_PAGE = 100
• Added environment_keys parameter to get_flags() to pass required env filter
• Request flags by batch of 3 environments if > to 3
• Fixed parsing for LD JSON values

How did you test this code?

• Curl requests

  curl -X POST "http://localhost:8000/api/v1/projects/{PROJECT_ID}/imports/launch-darkly/" \
    -H "Authorization: Token {user_token_from_frontend}" \
    -H "Content-Type: application/json" \
    -d '{"token": "{LD_TOKEN}", "project_key": "default"}'

• Import from frontend

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

3 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs	Ignored	Preview	Jan 30, 2026 7:49pm
flagsmith-frontend-preview	Ignored	Preview	Jan 30, 2026 7:49pm
flagsmith-frontend-staging	Ignored	Preview	Jan 30, 2026 7:49pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-6603	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-6603	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-6603	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api:pr-6603	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-6603	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-6603	Finished ✅	Results ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.18%. Comparing base (a0d5aa9) to head (27c3ef6).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6603   +/-   ##
=======================================
  Coverage   98.18%   98.18%           
=======================================
  Files        1295     1295           
  Lines       46920    46968   +48     
=======================================
+ Hits        46067    46115   +48     
  Misses        853      853           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[emyller]

The rationale looks solid, but the implementation needs attention in its design.

[emyller]

Additionally, I think it is important that the PR title represents what this is, rather than how it was accomplished. Suggestion as follows:

fix(LaunchDarkly importer): Update API version to 20240415

This is how it displays in the CHANGELOG, and I believe it looks clearer and more accurate than current:

feat: added-limits-and-envs-in-ld-import-query-params

[emyller]

Looks much better, thank you!

I've observed a couple improvements we can make to performance and memory, which leads me to think all the import process could be improved too. Absolutely not a blocker, though I'm curious to how big a LD import can be — we'll wait and see I think.

[emyller]

LGTM