v0.4.0

• f63c447 chore: Release v0.4.0
• 3c6edcd docs: Update runbook
• 65770cc refactor: Move common upload functionalities to a dedicated func
• 9a37dab perf: Fix intermittent frozen progress bar
• a3fc123 perf: Replace RepeatedTimer class with a non-blocking, daemon-thread version
• 6e4a2bb docs: Update README.md and runbook
• 453ae83 fix: Bug fix for inflated upload and pending size in metadata output
• d2ebd83 refactor: Take metadata filename and upload interval as object parameters
• f333cb0 feat: Include a new feature to periodically write a metadata JSON file to S3 with upload stats
• 7f17a7c revert: Rollback moving upload queue and sizing info to upload initializer
• ab5e718 refactor: GET available buckets before verifying target bucket's availability
• e6fa71c docs: Add a least-privilege S3 policy in README.md
• 03dde8a refactor: Move upload queue and sizing info to upload initializer
• dfef7b7 feat: Log file size on S3 and local before initiating upload process
• 0cbb253 docs: Update runbook
• f0d3cbd chore: Update release notes for v0.3.2