feat(ecocredit/core): query batches by issuer

[technicallyty]

Description

• adds issuer field to BatchInfo table
• adds issuer index to BatchInfo table
• adds query by issuer for batches

Closes: #167

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Author Checklist

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Reviewers Checklist

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• confirmed the correct type prefix in the PR title
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• reviewed state machine logic
• reviewed API design and naming
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[codecov]

Codecov Report

Merging #955 (e060e1d) into master (90af8c3) will decrease coverage by 0.15%.
The diff coverage is 54.54%.

@@            Coverage Diff             @@
##           master     #955      +/-   ##
==========================================
- Coverage   73.08%   72.92%   -0.16%     
==========================================
  Files         197      197              
  Lines       23196    23192       -4     
==========================================
- Hits        16952    16913      -39     
- Misses       4952     4992      +40     
+ Partials     1292     1287       -5     

Flag	Coverage Δ
experimental-codecov	72.92% <54.54%> (-0.05%)	⬇️
stable-codecov	?

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[ryanchristo]

Looks good to me.

[ryanchristo]

For reference, this was removed during the project updates and will not require a state migration to add the field as the it currently exists in the v1alpha1 version live on mainnet and redwood.