IFC-2184: Add MERGED to branch status

[solababs]

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[cloudflare-workers-and-pages]

Deploying infrahub-sdk-python with    Cloudflare Pages

Latest commit:	8bd79d5
Status:	✅  Deploy successful!
Preview URL:	https://a44ae16f.infrahub-sdk-python.pages.dev
Branch Preview URL:	https://sb-20260203-freeze-branch-fe.infrahub-sdk-python.pages.dev

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@           Coverage Diff            @@
##           develop     #794   +/-   ##
========================================
  Coverage    80.36%   80.36%           
========================================
  Files          115      115           
  Lines         9865     9866    +1     
  Branches      1504     1504           
========================================
+ Hits          7928     7929    +1     
  Misses        1415     1415           
  Partials       522      522           

Flag	Coverage Δ
integration-tests	41.41% <0.00%> (-0.01%)	⬇️
python-3.10	51.37% <0.00%> (-0.01%)	⬇️
python-3.11	51.37% <0.00%> (+0.01%)	⬆️
python-3.12	51.35% <0.00%> (-0.03%)	⬇️
python-3.13	51.35% <0.00%> (-0.03%)	⬇️
python-3.14	53.00% <0.00%> (-0.03%)	⬇️
python-filler-3.12	24.08% <100.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
infrahub_sdk/branch.py	68.53% <100.00%> (+0.22%)	⬆️

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