Standardize logging to use logrus consistently across the repository

[Copilot]

The mlflow package aliased logrus as log and used log.Printf/log.Println, while cmd/root.go used the stdlib log package. Both deviated from the established logrus.Levelf("component: action message") convention used everywhere else.

Changes

• pkg/modelprovider/mlflow/downloader.go, provider.go: Replace log "github.com/sirupsen/logrus" alias with direct import. Convert all log.Printf/log.Println to appropriate logrus level calls (Infof, Debugf, Errorf, Warnf) with "mlflow:" component prefix.
• cmd/root.go: Replace stdlib log.Fatal → logrus.Fatal, drop unused "log" import.

Before/After

// before
log "github.com/sirupsen/logrus"
log.Printf("Start pull model from model registry with version %s", v)
log.Printf("Error listing objects: %v\n", err)
log.Printf("✅ Model downloaded")

// after
"github.com/sirupsen/logrus"
logrus.Infof("mlflow: starting pull model from registry with version %s", v)
logrus.Errorf("mlflow: failed to list objects: %v", err)
logrus.Infof("mlflow: model downloaded successfully")

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.