feat: add slog structured logging

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

internal/api/router.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"log/slog"
 	"net/http"
 
 	"codespace/internal/service"
@@ -9,10 +10,11 @@ import (
 )
 
 // NewRouter builds a Gin engine with all API routes registered.
-func NewRouter(workspaces *service.WorkspaceService, files *service.FileService, processes *service.ProcessService) *gin.Engine {
-	//gin.SetMode(gin.ReleaseMode)
+func NewRouter(workspaces *service.WorkspaceService, files *service.FileService, processes *service.ProcessService, lg *slog.Logger) *gin.Engine {
+	gin.SetMode(gin.ReleaseMode)
 	r := gin.New()
 	r.Use(gin.Recovery())
+	r.Use(requestLogger(lg))
 
 	wsHandler := &workspaceHandler{svc: workspaces}
 	fileHandler := &fileHandler{svc: files}