Constrain test_ra_dec_roll regression test to a specific date

[taldcroft]

Description

The test_ra_dec_roll regression test includes a star with high-enough proper motion to start failing after a short time. The check of the final summary output looks for stability at the 0.01 arcsec level.

This PR constrains the test date to that of #32 so that the test should always pass.

Fixes #34

Interface impacts

Testing

Unit tests

• Mac

(ska3) ➜  find_attitude git:(fix-regression-test-again-#34) env PYTHONPATH=/Users/aldcroft/git/ska_helpers:/Users/aldcroft/git/ska_sun pytest
=============================================== test session starts ================================================
platform darwin -- Python 3.11.8, pytest-7.4.4, pluggy-1.4.0
rootdir: /Users/aldcroft/git
configfile: pytest.ini
plugins: timeout-2.2.0, anyio-4.3.0
collected 24 items                                                                                                 

find_attitude/tests/test_find_attitude.py ........................                                           [100%]

=============================================== 24 passed in 58.70s ================================================
(ska3) ➜  find_attitude git:(fix-regression-test-again-#34) git rev-parse HEAD
950622081e2191feed41ebffe5f6e6e0643c1d6b

Independent check of unit tests by Jean

• Mac

(ska3-flight-accel) flame:find_attitude jean$ git rev-parse HEAD
950622081e2191feed41ebffe5f6e6e0643c1d6b
(ska3-flight-accel) flame:find_attitude jean$ pytest
============================================================= test session starts ==============================================================
platform darwin -- Python 3.11.8, pytest-7.4.4, pluggy-1.4.0
rootdir: /Users/jean/git
configfile: pytest.ini
plugins: astropy-0.11.0, cov-5.0.0, timeout-2.2.0, remotedata-0.4.1, anyio-4.3.0, filter-subpackage-0.2.0, doctestplus-1.2.1, astropy-header-0.2.2, hypothesis-6.112.0, arraydiff-0.6.1, mock-3.14.0
collected 24 items                                                                                                                             

find_attitude/tests/test_find_attitude.py ........................                                                                       [100%]

============================================================= 24 passed in 54.87

Functional tests

I confirmed that test_ra_dec_roll was failing locally prior to the fix.

[jeanconn]

I was concerned this change would reduce coverage for the case of no Constraints, but technically you've increased test coverage by adding a test of off_nom_roll_max=None.

[taldcroft]

I was concerned this change would reduce coverage for the case of no Constraints, but technically you've increased test coverage by adding a test of off_nom_roll_max=None.

There is still at least one test with no constraints.