fix: include proto file in build for openfeature-provider-flagd

[federicobond]

This should fix #44. hatch now generates the proto client files during the build stage.

We can probably find a cleaner solution later.

[codecov]

Codecov Report

Attention: Patch coverage is 41.02564% with 69 lines in your changes are missing coverage. Please review.

Project coverage is 71.04%. Comparing base (d8e10c7) to head (8e8ff2e).
Report is 7 commits behind head on main.

Files	Patch %	Lines
...ntrib/provider/flagd/proto/schema/v1/schema_pb2.py	24.00%	38 Missing ⚠️
.../provider/flagd/proto/schema/v1/schema_pb2_grpc.py	53.73%	31 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #45       +/-   ##
===========================================
- Coverage   90.55%   71.04%   -19.52%     
===========================================
  Files           8       10        +2     
  Lines         180      297      +117     
===========================================
+ Hits          163      211       +48     
- Misses         17       86       +69     

Flag	Coverage Δ
unittests	71.04% <41.02%> (-19.52%)	⬇️

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[federicobond]

@toddbaert damn, hatch requires python 3.9+. I have to go now, but feel free to edit this PR

[gruebel]

I found a similar solution, but yours seems better 😄

[gruebel]

@toddbaert damn, hatch requires python 3.9+. I have to go now, but feel free to edit this PR

the plugin requires Python 3.9 😢

[toddbaert]

@toddbaert damn, hatch requires python 3.9+. I have to go now, but feel free to edit this PR

No worries!

Bummer about 3.8... Looks like it isn't eol until October... Not sure we should drop early, but that's an option.