feat: merkle-maker + MerkleFeed mixin

[akhercha]

Closes #NA

Introduced changes

Pragma SDK

• MerkleFeed mixin + simple tests
• removed init_stats_contract and init correctly the stats contract like the other
• re-added the update_abis poe command
• Fixed pragma-sdk offchain requests - breaking change in our package, they need to be converted to string manually.

Pragma Oracle

• Updated the branch to main ; was pointing a certain rev, not sure why

Merkle Maker

• MerkleFeedPublisher class that handles the publishing onchain + to Redis,
• Redis structure updated, see RedisManager docstring,
• Fixed __hash__ not working,

[codecov]

Codecov Report

Attention: Patch coverage is 63.63636% with 12 lines in your changes missing coverage. Please review.

Project coverage is 47.03%. Comparing base (3c7942a) to head (c7b3873).
Report is 25 commits behind head on master.

Files	Patch %	Lines
pragma-sdk/pragma_sdk/onchain/client.py	50.00%	4 Missing ⚠️
...ragma-sdk/pragma_sdk/onchain/mixins/merkle_feed.py	66.66%	4 Missing ⚠️
pragma-sdk/pragma_sdk/onchain/mixins/summary.py	60.00%	2 Missing ⚠️
.../common/fetchers/generic_fetchers/deribit/types.py	50.00%	1 Missing ⚠️
pragma-sdk/pragma_sdk/offchain/client.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #178       +/-   ##
===========================================
+ Coverage   16.12%   47.03%   +30.90%     
===========================================
  Files           6       63       +57     
  Lines          62     3121     +3059     
===========================================
+ Hits           10     1468     +1458     
- Misses         52     1653     +1601     

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[akhercha]

@EvolveArt I made some significant changes in the merkle-maker repo, need a new review sir

[EvolveArt]

reviewed