Fix task stats concurrency overcounting

[igor-kupczynski]

Description

TBD, still iterating

Fixes #4394

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Documentation change (pure documentation change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking changes to code which doesn't change any behaviour)
• CI (any automation pipeline changes)
• Chore (changes which are not directly related to any business logic)
• Test changes (add, refactor, improve or change a test)
• This change requires a documentation update

What's Changed

• Add a list of tasks or features here...

Checklist

Changes have been:

• Tested (unit, integration, or manually with steps specified)
• Linted and formatted
• Documented (where applicable)
• Added to CHANGELOG (where applicable) -- see Keep a Changelog

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🤖 AI Disclosure

• I acknowledge that an LLM was used in the creation of this Pull Request, in accordance with Hatchet's AI_POLICY.md.

• Details: Cursor with gpt was used to iterate on the PR

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Project	Deployment	Actions	Updated (UTC)
hatchet-docs	Ready	Preview, Comment	Jul 10, 2026 4:05pm