Processing updates

[theHenks]

Added functionality which was so far in the dataflow:

• is_analysis_run checks if the run is a analysis run
• start_key returns the starting FileKey for a given period and run
• phy_livetime returns the livetime for a given run and period

Also, I extended the channelinfo to be able to get the info for a given run and period by using the start_key as a reference and also to get a handy access to the :geds subsytem with

channelinfo(l200, (:p03, :r000, :cal))
channelinfo(l200, (:p03, :r000, :cal); system=:geds, processable=true)

This makes this whole process of getting filekeys etc way more handy and the user can just get the channelinfo for a given run much more human readable.

I will also move some of the addprocs functionality and try to start with some of the logging stuff.
Maybe @oschulz, you could also share some ideas here. The missing features are here a way to first create Markdown logs and then write them.
Then, a function savelegendfig would be nice which automatically generates figure names and saves a given figure.
And the option to save units in the PropDicts as discussed.

[codecov]

Codecov Report

Attention: 44 lines in your changes are missing coverage. Please review.

Comparison is base (a898a51) 50.65% compared to head (59e5b50) 48.96%.

Files	Patch %	Lines
src/dataprod_config.jl	0.00%	26 Missing ⚠️
src/legend_data.jl	45.45%	12 Missing ⚠️
src/filekey.jl	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #22      +/-   ##
==========================================
- Coverage   50.65%   48.96%   -1.69%     
==========================================
  Files          15       15              
  Lines         922      966      +44     
==========================================
+ Hits          467      473       +6     
- Misses        455      493      +38     

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[theHenks]

Ready to merge now from my side. What do you say @oschulz ?

[oschulz]

Thanks!