Add pod-job model

[Synicix]

Added pod_job model for impending orcastration stuff. Also revert some changes that got pushed with the merge. Did some renaming of item to model

[Synicix]

Summary of changes:

• Add pod job model
• Add save and load functions for store for the file store
• Add compute_check_sum for file or folder to the store trait and implmented it in filestore with merkle_hash for efficient computation (it uses Blake3 which is apprently faster than sha256, but need to actually indepdent test it)
• Add wipe functionailty for wiping entire store
• Change filestore functions to fully support annotationless operations
• Redesign filestore test to full test all model more parallelization