F update

Summary

Implements update for a single entity

See https://gitlab.indiscale.com/caosdb/customers/lfpb/management/-/issues/392

Focus

• Updating entities works like this: Retrieve an entity, copy it and put it in the update transaction.
• ResultSet has an iterator now
• I privatated SetId and SetVersionId (nobody should ever need to change it, because Entities which are to be updated have to be retrieved first anyway.)
• More fine-grained TransactionStatus (INITIAL -> GO_ON -> READY -> EXECUTE -> SUCCESS/ERROR) and corresponding StatusCodes

Test Environment

Use with server branch f-grpc-f-update

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass
• Reference related Issues
• Up-to-date CHANGELOG.md
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

test/test_entity.cpp

@@ -79,8 +79,6 @@ TEST(test_entity, test_insert_with_role) { // NOLINT
     std::shared_ptr<transaction::EntityTransactionService::Stub>(nullptr));
 
   auto entity = Entity();
-  entity.SetId("entity_id");
-  entity.SetVersionId("version_id");
   entity.SetRole("Property");
   entity.SetDatatype("DOUBLE");
   entity.SetName("Length");
@@ -89,8 +87,6 @@ TEST(test_entity, test_insert_with_role) { // NOLINT
 
   transaction.InsertEntity(&entity);
 
-  EXPECT_EQ(entity.GetId(), "entity_id");
-  EXPECT_EQ(entity.GetVersionId(), "version_id");
   EXPECT_EQ(entity.GetRole(), "Property");
   EXPECT_EQ(entity.GetDatatype(), "DOUBLE");
   EXPECT_EQ(entity.GetName(), "Length");