Replace repr() with str() when passing to axTime3.convert_time

[jeanconn]

Description

repr() was intended to get the number to as many digits as available to pass to convert_time, in modern Python using str() should be fine.

This has no impact in numpy 1.26.4 but is required for this code to work with numpy > 2 as the new repr behavior (includes the np type in the string) doesn't work with axTime3.convert . With Python > 3.1, str() should have enough digits for this code change to be non-impacting.

Interface impacts

None.

Testing

Unit tests

• Mac

(latest) flame:chandra_time jean$ git rev-parse HEAD
0bbb3953e1d9cbd48dcbe5512085ad85f7824264
(latest) flame:chandra_time jean$ pytest
====================================================== test session starts =======================================================
platform darwin -- Python 3.12.8, pytest-8.3.4, pluggy-1.5.0
rootdir: /Users/jean/git/chandra_time
configfile: pytest.ini
plugins: anyio-4.7.0, timeout-2.3.1
collected 48 items                                                                                                               

chandra_time/tests/test_Time.py ................................................                                           [100%]

======================================================= 48 passed in 1.32s

And on the latest hope rc

(ska3-flight-2026.0rc4) flame:chandra_time jean$ git rev-parse HEAD
0bbb3953e1d9cbd48dcbe5512085ad85f7824264
(ska3-flight-2026.0rc4) flame:chandra_time jean$ pytest
==================================================================== test session starts ====================================================================
platform darwin -- Python 3.13.10, pytest-9.0.1, pluggy-1.6.0
rootdir: /Users/jean/git/chandra_time
configfile: pytest.ini
plugins: anyio-4.12.0, timeout-2.4.0
collected 48 items                                                                                                                                          

chandra_time/tests/test_Time.py ................................................                                                                      [100%]

==================================================================== 48 passed in 3.46

Independent check of unit tests by [REVIEWER NAME]

• [PLATFORM]:

Functional tests

No functional testing.

[jeanconn]

It looks like there are a few more repr() calls in Time.py, but that they are working on values that have already been explicitly converted to Python floats. So we can update those to str() or not - they look to be non-impacting for numpy 2.