Refactor settings handling to support context-based reloading and add utility functions for context management

internal/tasks/inventorySnapshots.go

@@ -16,6 +16,7 @@ import (
 	"vctp/db/queries"
 	"vctp/internal/metrics"
 	"vctp/internal/report"
+	"vctp/internal/settings"
 	"vctp/internal/utils"
 	"vctp/internal/vcenter"
 
@@ -116,8 +117,11 @@ func (c *CronTask) RunVcenterSnapshotHourly(ctx context.Context, logger *slog.Lo
 	// Best-effort cleanup of legacy IsPresent columns to simplify inserts.
 	c.dropLegacyIsPresentColumns(jobCtx)
 
-	// reload settings in case vcenter list has changed
-	c.Settings.ReadYMLSettings()
+	// Reload settings once for this run (for example, in case vCenter list has changed).
+	if err := c.Settings.ReadYMLSettings(); err != nil {
+		return err
+	}
+	ctx = settings.MarkReloadedInContext(ctx, c.Settings)
 
 	if c.FirstHourlySnapshotCheck {
 		if err := report.EnsureSnapshotRegistry(ctx, c.Database); err != nil {