TypeScript checks not executed by CI and failing

[bajtos]

(1)
The CI workflow does not run TSC, only prettier & standard.

piece-indexer/.github/workflows/ci.yml

Lines 132 to 140 in 0cc9f61

	lint-all:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-node@v4
	with:
	node-version: 20
	- run: npm ci
	- run: npm run lint

We need to add another step - npm run test:types

(2)
Typecheck currently fails. We need to fix all TypeScript errors.