[#804] ape: Implement boltdb storage for local overrides

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

pkg/ape/chainbase/inmemory.go

@@ -0,0 +1,30 @@
+package chainbase
+
+import (
+	"context"
+
+	"git.frostfs.info/TrueCloudLab/policy-engine/pkg/engine"
+	"git.frostfs.info/TrueCloudLab/policy-engine/pkg/engine/inmemory"
+)
+
+type inmemoryLocalOverrideStorage struct {
+	engine.LocalOverrideStorage
+}
+
+func NewInmemoryLocalOverrideDatabase() LocalOverrideDatabase {
+	return &inmemoryLocalOverrideStorage{
+		LocalOverrideStorage: inmemory.NewInmemoryLocalStorage(),
+	}
+}
+
+func (cs *inmemoryLocalOverrideStorage) Init() error {
+	return nil
+}
+
+func (cs *inmemoryLocalOverrideStorage) Open(_ context.Context) error {
+	return nil
+}
+
+func (cs *inmemoryLocalOverrideStorage) Close() error {
+	return nil
+}