feat(Code References): Allow empty code reference scans to clear references

[emyller]

• 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.

Changes

Closes #7763.

Allow pushing empty code references, meaning "clear all code references in given repository".

How did you test this code?

Included new test case.

[vercel]

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3 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs	Ignored		Jun 11, 2026 7:57pm
flagsmith-frontend-preview	Ignored		Jun 11, 2026 7:57pm
flagsmith-frontend-staging	Ignored		Jun 11, 2026 7:57pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-7764	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-7764	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-7764	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-7764	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api:pr-7764	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-7764	Finished ✅	Results ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.56%. Comparing base (5d410f2) to head (4f9ad90).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7764      +/-   ##
==========================================
+ Coverage   98.49%   98.56%   +0.06%     
==========================================
  Files        1459     1459              
  Lines       56095    56134      +39     
==========================================
+ Hits        55253    55327      +74     
+ Misses        842      807      -35     

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[github-actions]

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

 1 passed

Details

 1 test across 1 suite
 40.7 seconds
 4f9ad90
 🔄 Run: #17443 (attempt 1)

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

 1 passed

Details

 1 test across 1 suite
 44.3 seconds
 4f9ad90
 🔄 Run: #17443 (attempt 1)

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

 2 passed

Details

 2 tests across 2 suites
 41.4 seconds
 4f9ad90
 🔄 Run: #17443 (attempt 1)

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

 3 passed

Details

 3 tests across 3 suites
 40 seconds
 4f9ad90
 🔄 Run: #17443 (attempt 1)

[github-actions]

Visual Regression

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