(VDB-298) Consume Pit contract storage diffs

- Continuously parse storage diffs CSV data to read Pit contract state
- Convert ilks in database to raw bytes32 value for use in generating
  storage keys dynamically
- Persist storage diffs with block number and hash for validation

pkg/transformers/storage_diffs/maker/test_helpers/maker_storage_repository.go

@@ -0,0 +1,19 @@
+package test_helpers
+
+import "github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
+
+type MockMakerStorageRepository struct {
+	GetIlksCalled bool
+	ilks          []string
+}
+
+func (repository *MockMakerStorageRepository) GetIlks() ([]string, error) {
+	repository.GetIlksCalled = true
+	return repository.ilks, nil
+}
+
+func (repository *MockMakerStorageRepository) SetDB(db *postgres.DB) {}
+
+func (repository *MockMakerStorageRepository) SetIlks(ilks []string) {
+	repository.ilks = ilks
+}