Two of the earlier small tweaks from the R package - monitor log hazard ratio for boostrapping and print Hazard ratio

[remlapmot]

This

• Monitors the log hazard ratio instead of the hazard ratio due to better normality properties
• Prints "Hazard ratio" instead of "Hazard" in two places
• Bumps the version number.

[remlapmot]

It seems the Python 3.10 tests have failed due to the recent requirement of the lifelines package for Python 3.11, so we seem to have 2 options:

• either pin lifelines to the previous version which allowed 3.10
• make Python 3.11 our min version

[remlapmot]

The 3.14 test passes on my local machine - just GHA being flaky I think

[ryan-odea]

It seems the Python 3.10 tests have failed due to the recent requirement of the lifelines package for Python 3.11, so we seem to have 2 options:

* either pin lifelines to the previous version which allowed 3.10

* make Python 3.11 our min version

I think it's good to make 3.11 our min version, I would only see more issues arise if we keep full support for previous versions.

[remlapmot]

Hopefully ok - I'll merge this now before I do too much other fiddling (plus have limited time today)