Chk/improve logging

[ckebschull]

• Harmonized message and error message log format
• Use single routine to compile log record

[github-actions]

	Tests	Passed ✅	Skipped	Failed
JUnit Test Report	9 ran	9 passed	0 skipped	0 failed

Test	Result
JUnit Test Report
test_itrf2gcrf_1	✅ passed
test_itrf2gcrf_2	✅ passed
test_mean2true	✅ passed
test_astro	✅ passed
test_time_class	✅ passed
test_fid_operations	✅ passed
test_io_nxtbuf	✅ passed
test_io_parse_from_fid	✅ passed
test_io_sprint	✅ passed

• View JUnit Test Report

[ckebschull]

I see that the pFUnit tests are not running - need to fix that.
@zurdala - can you check whether these changes for logging break something for us?

[zurdala]

I see that the pFUnit tests are not running - need to fix that. @zurdala - can you check whether these changes for logging break something for us?

We have our internal fork to avoid these changes going in directly, so there is no need to worry @ckebschull