Add model metadata to request schema

[AlyssaCote]

This PR adds a Model schema in the Request schema with metadata about the model included so that it's not just a data blob. I also tweaked some of the attribute names. For example, what was request.input.inputKeys is now request.input.keys.

[codecov]

Codecov Report

Attention: Patch coverage is 62.79070% with 16 lines in your changes missing coverage. Please review.

Please upload report for BASE (mli-feature@ee2c110). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
.../_core/mli/infrastructure/control/workermanager.py	0.00%	10 Missing ⚠️
smartsim/_core/mli/message_handler.py	78.26%	5 Missing ⚠️
smartsim/_core/mli/infrastructure/worker/worker.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff               @@
##             mli-feature     #624   +/-   ##
==============================================
  Coverage               ?   66.82%           
==============================================
  Files                  ?       97           
  Lines                  ?     6734           
  Branches               ?        0           
==============================================
  Hits                   ?     4500           
  Misses                 ?     2234           
  Partials               ?        0           

Files with missing lines	Coverage Δ
...core/mli/mli_schemas/data/data_references_capnp.py	100.00% <ø> (ø)
...martsim/_core/mli/mli_schemas/model/model_capnp.py	100.00% <100.00%> (ø)
...est/request_attributes/request_attributes_capnp.py	100.00% <ø> (ø)
...sim/_core/mli/mli_schemas/request/request_capnp.py	100.00% <ø> (ø)
...e/response_attributes/response_attributes_capnp.py	100.00% <ø> (ø)
...m/_core/mli/mli_schemas/response/response_capnp.py	100.00% <ø> (ø)
...rtsim/_core/mli/mli_schemas/tensor/tensor_capnp.py	100.00% <ø> (ø)
smartsim/_core/mli/infrastructure/worker/worker.py	78.48% <50.00%> (ø)
smartsim/_core/mli/message_handler.py	75.82% <78.26%> (ø)
.../_core/mli/infrastructure/control/workermanager.py	18.10% <0.00%> (ø)

[ankona]

I see a couple minor license issues and a potential breaking bug to fix. Otherwise, looks good.

[ankona]

LGTM