Improve query to find candles map. (backport #2650)

[mergify]

Changelist

Optimize queries to find initial map for candles by limiting the time period to search over for latest candles, and using a single query to get all the latest candles rather than repeated querying for a single ticker's candles.

Test Plan

Unit tests.

Author/Reviewer Checklist

• If this PR has changes that result in a different app state given the same prior state and transaction list, manually add the state-breaking label.
• If the PR has breaking postgres changes to the indexer add the indexer-postgres-breaking label.
• If this PR isn't state-breaking but has changes that modify behavior in PrepareProposal or ProcessProposal, manually add the label proposal-breaking.
• If this PR is one of many that implement a specific feature, manually label them all feature:[feature-name].
• If you wish to for mergify-bot to automatically create a PR to backport your change to a release branch, manually add the label backport/[branch-name].
• Manually add any of the following labels: refactor, chore, bug.

Summary by CodeRabbit

• New Features

  • Enhanced candle retrieval logic using raw SQL queries for improved performance.
  • Added performance monitoring for cache initialization.

• Bug Fixes

  • Improved error handling in block cache refresh functionality for clearer logging.

• Tests

  • Updated test suite for CandlesGenerator to handle new date management with luxon.
  • Adjusted test cases to ensure compatibility with changes in date handling.

• Refactor

  • Removed unnecessary parameters in candle retrieval functions for streamlined logic.

---

This is an automatic backport of pull request #2650 done by [Mergify](https://mergify.com).

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