Revert "Merge branch 'canary' into kucherenko/canary"

This reverts commit 819822f30b, reversing
changes made to bda9b05134.

apps/monitoring/database/cleanup.go

@@ -1,52 +0,0 @@
-package database
-
-import (
-	"database/sql"
-	"log"
-	"time"
-
-	"github.com/robfig/cron/v3"
-)
-
-// CleanupMetrics deletes metrics older than the retention period
-func CleanupMetrics(db *sql.DB, retentionDays int) error {
-	cutoffDate := time.Now().AddDate(0, 0, -retentionDays)
-	cutoffDateStr := cutoffDate.UTC().Format(time.RFC3339Nano)
-
-	containerQuery := `DELETE FROM container_metrics WHERE timestamp < ?`
-	_, err := db.Exec(containerQuery, cutoffDateStr)
-	if err != nil {
-		return err
-	}
-
-	serverQuery := `DELETE FROM server_metrics WHERE timestamp < ?`
-	_, err = db.Exec(serverQuery, cutoffDateStr)
-	if err != nil {
-		return err
-	}
-
-	log.Printf("Metrics deleted (older than %d days)", retentionDays)
-	log.Printf("Cutoff date for both tables: %s", cutoffDateStr)
-	return nil
-}
-
-// StartMetricsCleanup starts a cron job to periodically clean up metrics
-func StartMetricsCleanup(db *sql.DB, retentionDays int, cronExpression string) (*cron.Cron, error) {
-	c := cron.New()
-
-	_, err := c.AddFunc(cronExpression, func() {
-		if err := CleanupMetrics(db, retentionDays); err != nil {
-			log.Printf("Error during metrics cleanup: %v", err)
-		}
-	})
-
-	if err != nil {
-		return nil, err
-	}
-
-	c.Start()
-	log.Printf("Started metrics cleanup job (retention: %d days, cron: %s)",
-		retentionDays, cronExpression)
-
-	return c, nil
-}