Require date to reset DB

[gpetretto]

After some internal discussion, we have decided to address #102 by requiring the addition of today's date from the CLI to reduce the probability of an accidental DB reset.

This also includes an update of the documentation concerning configuration with environment variables. @janosh, can you check if this fits your expectations?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 47.89%. Comparing base (8df1979) to head (01a7f25).

Files with missing lines	Patch %	Lines
src/jobflow_remote/jobs/jobcontroller.py	33.33%	2 Missing ⚠️
src/jobflow_remote/cli/admin.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #189      +/-   ##
===========================================
- Coverage    47.92%   47.89%   -0.04%     
===========================================
  Files           43       43              
  Lines         5156     5153       -3     
  Branches      1118     1117       -1     
===========================================
- Hits          2471     2468       -3     
- Misses        2424     2425       +1     
+ Partials       261      260       -1     

Files with missing lines	Coverage Δ
src/jobflow_remote/cli/admin.py	26.74% <0.00%> (-1.04%)	⬇️
src/jobflow_remote/jobs/jobcontroller.py	35.66% <33.33%> (-0.15%)	⬇️

[davidwaroquiers]

All good to me!