CI does not build or test the indexer service

[priscaenoch]

Problem

.github/workflows/ci.yml only runs root-level scripts (npm ci, npm run build, npm run validate:prisma, npm run lint, npm run typecheck:scripts, npm test). It never enters the indexer/ directory.

indexer/ is a separate Node package with its own package.json (octraban-indexer), its own scripts (start, dev, test, test:decoder, test:decoder-parity, test:scval, test:coverage), roughly 78 source files, and approximately 47 test files. None of it is installed, built, linted, or tested in CI.

This is the service the octraban_frontend actually consumes on :3001, so the most user-facing part of this repository has no CI coverage at all. A change that breaks the indexer or its decoder will pass CI.

What needs to be done

• Add a CI job (or matrix entry) with working-directory: indexer that runs npm ci and the indexer's own test scripts, including test:decoder and test:decoder-parity.
• Cache indexer/package-lock.json separately.
• Ensure the job fails the workflow on any indexer test failure.
• Confirm the indexer's test suite passes in CI as-is; fix or quarantine any tests that only pass locally.

Files

• .github/workflows/ci.yml
• indexer/package.json

Acceptance deliverables

• CI installs and tests the indexer/ package on every push and pull request.
• A deliberate break in the indexer decoder fails CI.

Tests to pass

• The indexer job completes green on the current main.
• npm run test:decoder and npm run test:decoder-parity run in CI.

[grantfox-oss]

🦊 GrantFox — @NUMBER72857 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #16)
2. Your PR will be reviewed by the octraban maintainers

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