New stdnorm calc + weights onchain

[xmariachi]

Purpose of Changes and their Description

This PR implements the rework on weights that fixes the latest outlier issues observed from experience and provides a cutoff on low weights for the stddev.

• Adds stores for latestStdnorm and latestWeights
• regrets returned on calculation
• At CloseReputerNonce, calculate stdnorm based on old weights, store it and recalculate weights.
• stdnorm used as normalization for all weights calculation cases.
• refactor and additional tests on weights.
• emits events on new stdnorm set, and on each new actor weight
• autocli query addition of latest stdnorm, latest inferer weight and latest forecaster weight
• adds v0.9.0 migration

Link(s) to Ticket(s) or Issue(s) resolved by this PR

Are these changes tested and documented?

• If tested, please describe how. If not, why tests are not needed.
  Tested with allora-simulator. The expectations from research are met.
• If documented, please describe where. If not, describe why docs are not needed.
  Internal implementation details, no need to post to the user.
• Added to Unreleased section of CHANGELOG.md?

Still Left Todo

• OPTIONAL: Optimization on weights from other actors taken from the latest ones. Implement a function that fills these weights from the store.
  • instead of calling "CalcWeightsGivenWorkers", take them from the store - however they will be different in the one-out cases because the elements differ.

[github-actions]

The latest Buf updates on your PR. Results from workflow Buf Linter / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	⏩ skipped	Feb 21, 2025, 4:09 AM

[amimart]

Great job thx!
I've made some remarks, the main point is to introduce a new migration for the next software upgrade to v0.9.0.

[kpeluso]

Few comments + Upgrade Flow then gtg

[amimart]

LGTM

[fernandofcampos]

LGTM. Great job, especially with the test coverage.