fix: resolve multiple registry issues

[devin-ai-integration]

Description

Fixes multiple issues found during a code review of the registry:

Critical

• Fix broken NPM package API: index.js was reading metadata.json but all chain data uses chain.json — loadChain() and getAllChains() were always returning null/[]

Bug Fixes

• Fix npm run validate: was pointing to ../L1Beat-backend/... (broken cross-repo ref); now uses a self-contained scripts/validate-all.js
• Fix template categories: _TEMPLATE/chain.json used mixed-case (DeFi, Gaming) but CI enforces uppercase → changed to DEFI, GAMING
• Fix enrichment idempotency: enrich-registry.js would overwrite manually-set empty logoUri on re-runs; now distinguishes undefined (never checked) from '' (checked, nothing found)
• Upgrade publish.yml actions from v3 → v4 to match validate-pr.yml
• Add generated files to .gitignore: enrichment-report.json, enrichment-errors.log, validation-report.md

Improvements

• Deduplicate CI validation logic: The "Generate validation report" step in validate-pr.yml was re-running all URL/RPC checks (~100 lines of duplicated code). Now earlier steps save warnings to JSON files, and the report step reads those.
• Add TypeScript type definitions (types.d.ts) for NPM package consumers
• Add JSON Schema (chain.schema.json) as a formal data contract reference

Type of Change

• Adding a new L1 chain
• Updating existing L1 information
• Fixing data errors
• Documentation improvements
• Other (please describe): Bug fixes for NPM API, CI pipeline, and DX improvements (types, schema, self-contained validation)

Chain Information

N/A — this PR modifies tooling/infrastructure, not chain data.

Checklist

• I have read the CONTRIBUTING.md guide
• JSON is properly formatted and valid
• Information is accurate and up-to-date

Human Review Checklist

Items worth extra attention during review:

• index.js change: Verify chain.json is the correct filename across all data/*/ folders (it is — metadata.json doesn't exist anywhere)
• chain.schema.json: Uses additionalProperties: false — if new fields are ever added to chain.json without updating the schema, schema-based validation would reject them. The schema is currently a reference only (not enforced in CI), but worth knowing.
• validate-all.js line 209: ${'='.join ? '=' : '━'.repeat(40)} is a quirky expression ('='.join is always undefined in JS, so it always falls through to '━'.repeat(40)). Works, but reads oddly.
• enrich-registry.js idempotency: The condition !chain.nativeToken.logoUri && chain.nativeToken.logoUri !== '' relies on JS falsy semantics — undefined/null pass through, '' does not. Confirm this matches intended behavior.
• CI workflow changes: The warning-file passing approach (url-warnings.json, etc.) degrades gracefully if a step is skipped (load_warnings catches FileNotFoundError), but this can only be fully validated by running the actual workflow.

Additional Notes

• The validate-all.js script treats empty nativeToken fields and null evmChainId as warnings (not errors), matching CI behavior for existing chain data. ~100 chains have these pre-existing data gaps.
• The JSON schema is published in the NPM package but not yet enforced in CI — it serves as documentation and can be adopted by consumers for IDE autocompletion.

Link to Devin session: https://app.devin.ai/sessions/06e9152c9b9f48c29c93dfa6ceb9c5f9
Requested by: @muhammetselimfe

---

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring

[devin-ai-integration]

Devin Review found 3 potential issues.

View 4 additional findings in Devin Review.