Add timeOperations include to fed-filter example and missing quotes to log messages

[laurmarinovici]

I have merged the bug fix in main and the helics3-ns3 updates in helics3-update-v2 and tested it. I would like to have all these updates in the main branch, so that main can be HELICS V3 compatible.

[nightlark]

Currently there are two blockers for this -- first is that the current source release of HELICS has a bug that is breaks the CI tests for helics-ns3, and the second is #45 needs to get merged to main which I think will require some form of tag to mark the "last compatible" HELICS v2 version of this module.

The broken CI builds should be resolved (this week?) when 3.2 is released.

ns-3 is also switching from waf to CMake, so it would be nice to get #47 into the last v2 compatible release to try to keep it working with new ns-3 releases for a bit longer.

[nightlark]

Okay, so update on where things are at right now:

• HELICS 3.2 should be getting tagged and released next week
• I'm going to be out until the following week; when I get back I'll target getting helics-ns3 updated the week of May 9-13

[nightlark]

I updated the description of this PR to match the changes made relative to PR #45.

@laurmarinovici can you test the main branch once this is merged to make sure it works for you (with an ns-3 version prior to ns-3.36)? If it works without issues, I'll make a release with a tag for this as the one to use for versions prior to ns-3.35.

Next will be adding support for building with CMake for compatibility with ns-3.36 and later (and likely drop support for building with waf; aside from having a slightly broken contrib module system, ns-3.36 also includes breaking changes to the code that will make helics-ns3 not be backwards compatible).