Update p2panda api

[sandreae]

• Author -> PublicKey and associated API changes
• previous_operations -> previous

📋 Checklist

• Add tests that cover your changes
• Add this PR to the Unreleased section in CHANGELOG.md
• Link this PR to any issues it closes
• New files contain a SPDX license header

[codecov]

Codecov Report

Merging #262 (39c7ba7) into main (57cedd4) will decrease coverage by 0.01%.
The diff coverage is 97.58%.

@@            Coverage Diff             @@
##             main     #262      +/-   ##
==========================================
- Coverage   93.96%   93.95%   -0.02%     
==========================================
  Files          59       59              
  Lines        4940     4928      -12     
==========================================
- Hits         4642     4630      -12     
  Misses        298      298              

Impacted Files	Coverage Δ
aquadoggo/src/db/stores/test_utils/runner.rs	90.19% <ø> (ø)
aquadoggo/src/graphql/replication/client.rs	84.61% <ø> (-1.10%)	⬇️
aquadoggo_cli/src/main.rs	0.00% <ø> (ø)
aquadoggo/src/graphql/scalars/public_key_scalar.rs	64.28% <40.00%> (ø)
aquadoggo/src/validation.rs	96.45% <88.23%> (ø)
aquadoggo/src/db/provider.rs	91.17% <100.00%> (-0.26%)	⬇️
aquadoggo/src/db/stores/entry.rs	95.59% <100.00%> (+0.03%)	⬆️
aquadoggo/src/db/stores/log.rs	95.83% <100.00%> (+0.18%)	⬆️
aquadoggo/src/db/stores/operation.rs	92.80% <100.00%> (ø)
aquadoggo/src/db/stores/test_utils/helpers.rs	100.00% <100.00%> (ø)
... and 12 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.