[feature] flame graph units update

**Phenomenon and reproduction steps**

**Root cause and solution**

**Impactions**

**Test method**

* master

**Affected branch(es)**

* main

**Checklist**

- [ ] Dependencies update required
- [ ] Common bug (similar problem in other repo)

deepflow-querier-datasource/pkg/plugin/datasource.go

@@ -311,6 +311,9 @@ func (d *Datasource) query(ctx context.Context, pCtx backend.PluginContext, quer
 							return response, fmt.Errorf("unexpected type for %v, assertion failed for float64, type %T", subValue[j], subValue[j])
 
 						}
+						if column != "level" {
+							floatValue *= 1000
+						}
 						dataAll[filed_name] = append(slice, floatValue)
 					} else {
 						return response, fmt.Errorf("unexpected type for %v, assertion failed, type %T", subValue[j], subValue[j])