Fix FicTrac timestamps. Coerce them to start at 0.

[h-mayorquin]

Note that this has #619 as a base.
In the context of #608.

Coercing the timestamps to start from 0 for FicTrac. In this case, the first row was actually a timestamp 0 that was modified by FicTrac logic see here:

rjdmoore/fictrac#29

[codecov]

Codecov Report

Merging #621 (f0b2bdb) into main (7495597) will decrease coverage by 0.13%.
Report is 1 commits behind head on main.
The diff coverage is 70.37%.

❗ Current head f0b2bdb differs from pull request most recent head 3f103e4. Consider uploading reports for the commit 3f103e4 to get more accurate results

@@            Coverage Diff             @@
##             main     #621      +/-   ##
==========================================
- Coverage   91.25%   91.13%   -0.13%     
==========================================
  Files         106      106              
  Lines        5408     5425      +17     
==========================================
+ Hits         4935     4944       +9     
- Misses        473      481       +8     

Flag	Coverage Δ
unittests	91.13% <70.37%> (-0.13%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...nterfaces/behavior/fictrac/fictracdatainterface.py	64.51% <70.37%> (-1.84%)	⬇️