v0.3.9 - optimized logs, metrics, and initialization

What's Changed

• fix submitBlock default error by @dmarzzz in #44
• Feature/publish block by @aratz-lasa in #66
• Fix data api underflow on low slots by @aratz-lasa in #36
• Wait until beacon node is synced on initialization by @aratz-lasa in #34
• Post deploy cleanup by @lukanus in #54
• Api change by @lukanus in #55
• Separate registrations by @lukanus in #67
• Clean logs, add metrics and reorg code by @aratz-lasa in #64

Full Changelog: v0.3.8...v0.3.9