Ignore generated Protobuf files in code coverage

[Copilot]

Generated Protobuf code in the protocol/ directory was being included in code coverage metrics.

Changes

• Added ignore section to codecov.yml with pattern protocol/*.pb.go to exclude all generated Protobuf files (both *.pb.go and *_grpc.pb.go)

coverage:
  status:
    patch:
      default:
        enabled: no

ignore:
  - "protocol/*.pb.go"

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Ignore generated Protobuf code in code coverage</issue_title>
<issue_description>Ignore generated Protobuf code in code coverage by edit codecov.yml

gorse/codecov.yml

Lines 1 to 5 in 30145df

	coverage:
	status:
	patch:
	default:
	enabled: no

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Ignore generated Protobuf code in code coverage #1084

---

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.73%. Comparing base (30145df) to head (1414e4c).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1085      +/-   ##
==========================================
+ Coverage   66.18%   70.73%   +4.54%     
==========================================
  Files          93       86       -7     
  Lines       18901    15263    -3638     
==========================================
- Hits        12510    10796    -1714     
+ Misses       5237     3422    -1815     
+ Partials     1154     1045     -109     

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