Introduce a /version API (#667)

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## Motivation and Context
<!-- Why is this change needed? What problem does it solve? -->
The following PR introduces a `/version` API that serves the build
details along with the version of the API server being served. The
`/version` endpoint allows users to programmatically query which exact
version of the registry is running in production for debugging.
~~auditing, and compatibility checks~~.

## How Has This Been Tested?
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tested? -->

## Breaking Changes
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## Types of changes
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the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
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that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
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Signed-off-by: Radoslav Dimitrov <radoslav@stacklok.com>

internal/api/server.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/danielgtaylor/huma/v2"
 
+	v0 "github.com/modelcontextprotocol/registry/internal/api/handlers/v0"
 	"github.com/modelcontextprotocol/registry/internal/api/router"
 	"github.com/modelcontextprotocol/registry/internal/config"
 	"github.com/modelcontextprotocol/registry/internal/service"
@@ -42,11 +43,11 @@ type Server struct {
 }
 
 // NewServer creates a new HTTP server
-func NewServer(cfg *config.Config, registryService service.RegistryService, metrics *telemetry.Metrics) *Server {
+func NewServer(cfg *config.Config, registryService service.RegistryService, metrics *telemetry.Metrics, versionInfo *v0.VersionBody) *Server {
 	// Create HTTP mux and Huma API
 	mux := http.NewServeMux()
 
-	api := router.NewHumaAPI(cfg, registryService, mux, metrics)
+	api := router.NewHumaAPI(cfg, registryService, mux, metrics, versionInfo)
 
 	// Wrap the mux with trailing slash middleware
 	handler := TrailingSlashMiddleware(mux)