RunDetection: Complete Implementation for nexus configured MARI runs.

[keiranjprice101]

Description of the issue

Confirm with Duc the remaining data values for the MARI stich rule.

Things to be Confirmed:

• ei values for summed runs
• will they actually include the remove_bkg as False
• Will the sam_rmm, sam_mass ever be included for summed runs
• Anything else to know?
• To simplify the mari script, could ei always be List[float] | 'auto' instead even for single runs instead of also including float for a single ei.
• Any info on the types if they are included in the nexus file. (e.g. an int in a nexus file is extracted as i32, etc.)

Based on this meeting update MariStitchRule and implement a summed runs e2e test.