1.4.5

[github-actions]

This is the release candidate for version 1.4.5.

[1.4.5]

Added

• Add workflow post-relay-subsidy-balance to post Relay subsidy balance reports to Slack (#211)

Changed

• chore: removes restore-keys from yarn install to prevent cache pollution (#213)
• feat: updated replay balance tracker workflow to run at 11:53 and 23:53 (#212)

Fixed

• fix: create_pr_if_not_exists check for closed/merged branches too (#208)

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Note

Low Risk
Low risk release bookkeeping only: updates version metadata and changelog links/entries without touching runtime code.

Overview
Prepares the 1.4.5 release by bumping package.json from 1.4.4 to 1.4.5.

Updates CHANGELOG.md with a new 1.4.5 section (Added/Changed/Fixed entries) and adjusts the compare links so [Unreleased] now targets v1.4.5 and adds the [1.4.5] link.

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