fix: reduce config warnings

[CAICAIIs]

Description

This PR fixes RPC method signature validation warnings for health server methods and improves server configuration handling.

Problem

The following warnings were being generated due to incorrect RPC method signatures:

2025-09-04 15:25:16 WARN common/rpc_service.go:382 method Resume of mtype func(health.HealthTripleServer) has wrong number of in out parameters 0; needs exactly 1/2
2025-09-04 15:25:16 WARN common/rpc_service.go:382 method SetServingStatus of mtype func(health.HealthTripleServer, string, triple_health.HealthCheckResponse_ServingStatus) has wrong number of in out parameters 0; needs exactly 1/2
2025-09-04 15:25:16 WARN common/rpc_service.go:382 method Shutdown of mtype func(health.HealthTripleServer) has wrong number of in out parameters 0; needs exactly 1/2

These warnings occur because the RPC service validation in common/rpc_service.go requires methods to have 1 or 2 return values (with the last one being error), but the health server methods had no return values.

Additionally, unnecessary warnings about missing service configurations were being shown when using the new server API without config files.

Related to apache/dubbo-go-samples#910

[codecov-commenter]

Codecov Report

❌ Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.63%. Comparing base (60d1c2a) to head (9accb9e).
⚠️ Report is 632 commits behind head on develop.

Files with missing lines	Patch %	Lines
server/server.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3018      +/-   ##
===========================================
- Coverage    46.76%   39.63%   -7.14%     
===========================================
  Files          295      457     +162     
  Lines        17172    38884   +21712     
===========================================
+ Hits          8031    15410    +7379     
- Misses        8287    22216   +13929     
- Partials       854     1258     +404     

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[Copilot]

Pull Request Overview

This PR fixes RPC method signature validation warnings for health server methods and reduces unnecessary configuration warnings when using the new server API without config files.

• Adds error return values to health server methods (Resume, SetServingStatus, Shutdown) to comply with RPC validation requirements
• Improves configuration handling to avoid warning about missing service configs when no services are configured
• Updates RPC service validation to exclude health helper methods from signature checks

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
protocol/triple/health/healthServer.go	Adds error return values to Resume, SetServingStatus, and Shutdown methods
server/server.go	Conditionally shows service config warnings only when services are actually configured
common/rpc_service.go	Excludes health helper methods from RPC validation checks

Comments suppressed due to low confidence (2)

protocol/triple/health/healthServer.go:1

• The SetServingStatus method now returns an error, but this call ignores the return value. The error should be handled or returned to the caller.

/*

protocol/triple/health/healthServer.go:1

• The SetServingStatus method now returns an error, but this call ignores the return value. The error should be handled or returned to the caller.

/*

---

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[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[marsevilspirit]

LGTM

[1kasa]

LGTM