Fix/allow stackerdb chunks

[zone117x]

Closes #2031

Allow the API to store stackerdb and block_proposal raw event bodies in postgres. No other processing is done -- this is only intended for debugging and to prevent the API from stalling stacks-core when these events are configured. Example stacks-node config toml:

[[events_observer]]
endpoint = "stacks-api:3700"
retry_count = 255
include_data_events = false
events_keys = ["*", "stackerdb", "block_proposal"]

[github-actions]

Vercel deployment URL: https://stacks-blockchain-q29nza9st-hirosystems.vercel.app 🚀

[codecov]

Codecov Report

Attention: Patch coverage is 12.50000% with 14 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/event-stream/event-server.ts	12.50%	14 Missing ⚠️

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[blockstack-devops]

🎉 This PR is included in version 8.2.0-beta.1 🎉

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[blockstack-devops]

🎉 This PR is included in version 8.2.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀