fix: bound concurrency for independent async work

[ReenigneArcher]

Description

Fixes sonar issues.

Screenshot

Issues Fixed or Closed

Roadmap Issues

Type of Change

• feat: New feature (non-breaking change which adds functionality)
• fix: Bug fix (non-breaking change which fixes an issue)
• docs: Documentation only changes
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semicolons, etc.)
• refactor: Code change that neither fixes a bug nor adds a feature
• perf: Code change that improves performance
• test: Adding missing tests or correcting existing tests
• build: Changes that affect the build system or external dependencies
• ci: Changes to CI configuration files and scripts
• chore: Other changes that don't modify src or test files
• revert: Reverts a previous commit
• BREAKING CHANGE: Introduces a breaking change (can be combined with any type above)

Checklist

• Code follows the style guidelines of this project
• Code has been self-reviewed
• Code has been commented, particularly in hard-to-understand areas
• Code docstring/documentation-blocks for new or existing methods/components have been added or updated
• Unit tests have been added or updated for any new or modified functionality

AI Usage

See our AI usage policy.

• None: No AI tools were used in creating this PR
• Light: AI provided minor assistance (formatting, simple suggestions)
• Moderate: AI helped with code generation or debugging specific parts
• Heavy: AI generated most or all of the code changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (05751b9) to head (fd6cc58).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@      Coverage Diff      @@
##   master   #151   +/-   ##
=============================
=============================

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Bundle Report

Changes will increase total bundle size by 463 bytes (0.2%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
contribkit-esm	232.5kB	463 bytes (0.2%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: contribkit-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
chunks/types-*.mjs	316 bytes	79.28kB	0.4%
cli.mjs	147 bytes	15.96kB	0.93%

Files in chunks/types-*.mjs:

• ./src/providers/githubContributions.ts → Total Size: 9.93kB

• ./src/providers/gitlabContributors.ts → Total Size: 2.2kB

Files in cli.mjs:

• ./src/renders/circles.ts → Total Size: 1.62kB