Integrate health monitoring into vMCP server

[yrobla]

Integrates the health monitoring infrastructure (from previous into the vMCP server, enabling periodic backend health checks with configurable intervals and thresholds.

Related-to: #3036

[Copilot]

Pull request overview

This PR integrates health monitoring infrastructure into the vMCP server to enable periodic backend health checks with configurable intervals and thresholds. The implementation provides a new HTTP endpoint for querying backend health status, graceful degradation when health monitoring fails, and authentication bypass for health check requests.

Key Changes:

• Added health monitor lifecycle management (initialization, startup, and shutdown) in the vMCP server
• Introduced /api/backends/health HTTP endpoint to expose backend health status
• Updated authentication strategies to skip authentication for health check requests

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
pkg/vmcp/server/server.go	Integrates health monitor into server lifecycle with configuration, initialization, start/stop management, new HTTP endpoint handler, and getter methods for health status
pkg/vmcp/server/health_monitoring_test.go	Comprehensive test coverage for health monitoring scenarios including disabled/enabled states, startup failures, HTTP endpoint behavior, and lifecycle management
pkg/vmcp/auth/strategies/tokenexchange.go	Updates token exchange authentication strategy to skip authentication for health check requests using context marker
pkg/vmcp/auth/strategies/header_injection.go	Updates header injection authentication strategy to skip authentication for health check requests using context marker
cmd/vmcp/app/commands.go	Configures health monitor from operational settings, mapping HealthCheckInterval and UnhealthyThreshold to health.MonitorConfig

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[codecov]

Codecov Report

❌ Patch coverage is 68.69565% with 36 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.16%. Comparing base (d55f7ec) to head (7c0cd81).
⚠️ Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/vmcp/app/commands.go	0.00%	22 Missing ⚠️
pkg/vmcp/server/server.go	82.50%	9 Missing and 5 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3101      +/-   ##
==========================================
+ Coverage   57.11%   57.16%   +0.05%     
==========================================
  Files         341      341              
  Lines       33949    34053     +104     
==========================================
+ Hits        19389    19468      +79     
- Misses      12951    12972      +21     
- Partials     1609     1613       +4     

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 6 comments.

---

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