Follow-up from the live debug pass: the code change itself still verifies locally.

Local checks:

• swift test --filter ToolRegistryTimeoutTests passed: 3/3 tests.
• swiftlint --strict Packages/OsaurusCore/Tools/ToolRegistry.swift Packages/OsaurusCore/Tests/Tool/ToolRegistryTimeoutTests.swift passed.

GitHub test-core is failing before tests execute with the same EventSource module-resolution class (CAsyncHTTPClient, CNIOLLHTTP, CNIOExtrasZlib, CNIOPosix, _NumericsShims). PR #975 is the shared CI/DerivedData fix and is now fully green, so I would land #975 first, then rerun this PR rather than treating the timeout patch as the failing root cause.

Status update after adding the clean-PR rule: this PR is now draft because its attached GitHub checks are not clean yet. It should move back to ready only after #975 lands/rebases into the branch and scripts/ci/check-pr-clean.sh osaurus-ai/osaurus 976 passes.

Reran #976 after local verification. Local status is clean:

• git diff --check origin/main...HEAD
• strict SwiftLint on ToolRegistry.swift and ToolRegistryTimeoutTests.swift
• cd Packages/OsaurusCore && swift test --filter ToolRegistryTimeoutTests (3 tests passed)
• cd Packages/OsaurusCore && swift build

I could not rerun the failed GitHub job directly because GitHub requires repository admin rights for gh run rerun, so I pushed an empty rerun commit (ef9afe3e). The fresh GitHub run still fails only in test-core, with the same EventSource dependency-resolution class:

• CAsyncHTTPClient
• CNIOLLHTTP
• CNIOExtrasZlib
• CNIOPosix
• _NumericsShims

No timeout-code regression is visible. Keeping this PR draft until #975 lands or the EventSource CI class is otherwise fixed.