fix(GitLab): issue/MR status in the feature Links panel goes stale after state changes

[emyller]

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• I have filled in the "Changes" section below.
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Changes

Closes #7370

Synchronises GitLab issue and merge request metadata (title and status) to Flagsmith when they're updated in GitLab.

How did you test this code?

New tests, and manual webhook-ngrok verification.

[claude]

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[vercel]

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview, Comment	May 19, 2026 7:59pm

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
flagsmith-frontend-preview	Ignored		May 19, 2026 7:59pm
flagsmith-frontend-staging	Ignored		May 19, 2026 7:59pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-7545	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-7545	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-7545	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-7545	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-7545	Finished ✅	Results ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.47%. Comparing base (24f4d1a) to head (3266b2d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #7545    +/-   ##
========================================
  Coverage   98.47%   98.47%            
========================================
  Files        1400     1402     +2     
  Lines       53034    53157   +123     
========================================
+ Hits        52224    52347   +123     
  Misses        810      810            

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[github-actions]

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

 1 passed

Details

 1 test across 1 suite
 35.4 seconds
 3266b2d
 🔄 Run: #16838 (attempt 1)

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

 3 passed

Details

 3 tests across 3 suites
 36.2 seconds
 3266b2d
 🔄 Run: #16838 (attempt 1)

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

 1 passed

Details

 1 test across 1 suite
 51.3 seconds
 3266b2d
 🔄 Run: #16838 (attempt 1)

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

 19 passed

Details

 19 tests across 15 suites
 1 minute, 45 seconds
 3266b2d
 🔄 Run: #16838 (attempt 1)

[github-actions]

Visual Regression

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

[khvn26]

Looks great — just one comment.

[khvn26]

gitlab.external_resource.metadata.refreshed reads a bit noisy.

Suggested change

	"external_resource.metadata.refreshed",
	"feature.metadata.updated",

Alternatively, since we're doing both tag and metadata updates in one sitting, consider consolidating the log at the gitlab_webhook level with an event like webhook.processed.