Add initial code to support unique per-entry IDs

This code has two caveats for old entries:
1. the ID is being backfiled with a random per-(device,entry) ID. So the ID won't match cross-device.
2. the server-side ID will still be a random ID that is unrelated to the entry ID

client/cmd/saveHistoryEntry.go

@@ -18,6 +18,7 @@ import (
 	"github.com/ddworken/hishtory/client/hctx"
 	"github.com/ddworken/hishtory/client/lib"
 	"github.com/ddworken/hishtory/shared"
+	"github.com/google/uuid"
 	"github.com/spf13/cobra"
 )
 
@@ -281,6 +282,9 @@ func buildPreArgsHistoryEntry(ctx context.Context) (*data.HistoryEntry, error) {
 	config := hctx.GetConf(ctx)
 	entry.DeviceId = config.DeviceId
 
+	// entry ID
+	entry.EntryId = uuid.Must(uuid.NewRandom()).String()
+
 	// custom columns
 	cc, err := buildCustomColumns(ctx)
 	if err != nil {