setup worker, queue and e2e tests

[gmaclennan]

Some initial setup of a new worker which uses a queue and writes data to supabase using a direct postgres connection in batches, rather than using the postgres rest api.

Still todo:

• merge package.json from main and merge in tooling from initial commit
• github actions setup to run e2e tests
• add client library as package and use that in e2e tests
• switch to declarative schema rather than migrations for managing views in particular
• Add deployment scripts and instructions
• Ensure deployment can only happen once tests pass
• Add route for transforming legacy metrics data into new events structure
• migrate existing metrics data in database to new structure

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​vitest/​coverage-istanbul@​3.2.4
	@​sentry/​cloudflare@​10.38.0
	@​cloudflare/​vitest-pool-workers@​0.12.9
	vitest@​3.2.4
	@​types/​node@​25.2.0
	@​sentry/​cli@​2.58.4
	execa@​9.6.1
	itty-router@​5.0.22
	valibot@​1.2.0
	postgres@​3.4.8
	supabase@​2.75.1
	type-fest@​5.4.3
	wrangler@​4.62.0

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