feat: add version info

Signed-off-by: allanice001 <allanice001@gmail.com>

internal/handlers/version.go

@@ -0,0 +1,65 @@
+package handlers
+
+import (
+	"net/http"
+	"runtime"
+	"runtime/debug"
+	"strconv"
+
+	"github.com/glueops/autoglue/internal/utils"
+	"github.com/glueops/autoglue/internal/version"
+)
+
+type VersionResponse struct {
+	Version    string `json:"version"  example:"1.4.2"`
+	Commit     string `json:"commit"   example:"a1b2c3d"`
+	Built      string `json:"built"    example:"2025-11-08T12:34:56Z"`
+	BuiltBy    string `json:"builtBy"  example:"ci"`
+	Go         string `json:"go"     example:"go1.23.3"`
+	GOOS       string `json:"goOS"   example:"linux"`
+	GOARCH     string `json:"goArch" example:"amd64"`
+	VCS        string `json:"vcs,omitempty"        example:"git"`
+	Revision   string `json:"revision,omitempty"   example:"a1b2c3d4e5f6abcdef"`
+	CommitTime string `json:"commitTime,omitempty" example:"2025-11-08T12:31:00Z"`
+	Modified   *bool  `json:"modified,omitempty"   example:"false"`
+}
+
+// Version godoc
+//
+//	@Summary		Service version information
+//	@Description	Returns build/runtime metadata for the running service.
+//	@Tags			Meta
+//	@ID				Version                 // operationId
+//	@Accept			json
+//	@Produce		json
+//	@Success		200	{object}	VersionResponse
+//	@Router			/version [get]
+func Version(w http.ResponseWriter, r *http.Request) {
+	resp := VersionResponse{
+		Version: version.Version,
+		Commit:  version.Commit,
+		Built:   version.Date,
+		BuiltBy: version.BuiltBy,
+		Go:      runtime.Version(),
+		GOOS:    runtime.GOOS,
+		GOARCH:  runtime.GOARCH,
+	}
+
+	if bi, ok := debug.ReadBuildInfo(); ok {
+		for _, s := range bi.Settings {
+			switch s.Key {
+			case "vcs":
+				resp.VCS = s.Value
+			case "vcs.revision":
+				resp.Revision = s.Value
+			case "vcs.time":
+				resp.CommitTime = s.Value
+			case "vcs.modified":
+				if b, err := strconv.ParseBool(s.Value); err == nil {
+					resp.Modified = &b
+				}
+			}
+		}
+	}
+	utils.WriteJSON(w, http.StatusOK, resp)
+}