feat: execute all steps and collect errors at end of chain

[jescalada]

Description

This PR implements one of fogwall's quality-of-life features: collecting all errors in the chain and reporting to the user, so they don't have to make multiple pushes and fix one-by-one. This still fails mid-chain if non-validator steps (parsePush, pullRemote, writePack, etc.) error out.

collectibleSteps are defined in chain.ts (steps that can be collected and reported later, as opposed to immediately failing).

Related Issue

Resolves #

Checklist

General

• I have read the CONTRIBUTING.md guidelines
• Commit messages follow Conventional Commits format
• I have a FINOS CLA on file

Documentation

• Documentation has been added/updated for any new features

Configuration

• If configuration schema (config.schema.json) was modified:
  • TypeScript types regenerated (npm run generate-config-types)
  • Schema reference docs regenerated (npm run gen-schema-doc)

Tests

• Tests have been added/updated for new functionality
• Unit tests pass (npm test)
• Linting and formatting pass (npm run lint and npm run format:check)
• Type checks pass (npm run check-types)

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[codecov]

Codecov Report

❌ Patch coverage is 92.30769% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.09%. Comparing base (9bc9c0d) to head (929b5ab).

Files with missing lines	Patch %	Lines
src/proxy/chain.ts	91.48%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1640      +/-   ##
==========================================
+ Coverage   85.97%   86.09%   +0.12%     
==========================================
  Files          87       87              
  Lines        8621     8661      +40     
  Branches     1492     1514      +22     
==========================================
+ Hits         7412     7457      +45     
+ Misses       1178     1173       -5     
  Partials       31       31              

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[coopernetes]

Overall LGTM, just a few notes/suggestions.

[kriswest]

LGTM, although I agree with @coopernetes that the config option can be removed and that processors could self declare their behaviour, which could have an impact on plugins. Up to you if you deal with the alter point in this PR or raise a follow-up issue. However, best to drop the config setting now if we don't need it

[jescalada]

@kriswest @coopernetes Ready for another look! I'm not sure about the plugin behavior - should these be collectible as well? I'm happy to open another PR for this to get this merged faster 👍🏼

[coopernetes]

LGTM