test: skip agent e2e when LLM budget is exhausted

[ling-senpeng13]

Summary

• add a Jest E2E results processor that converts only the provider's explicit API usage-limit failures to pending tests
• recompute suite and aggregate counts so unrelated failures still fail mixed runs
• add focused coverage for budget-only and mixed-failure results

Validation

• focused processor tests pass
• npm run lint completes with 0 errors (existing warnings remain)
• Jest E2E config resolves the processor successfully
• git diff --check passes

Environment limitations

• the full unit suite is blocked locally on Node 26.3.0 by the existing Poller.ts path failing with ReferenceError: clearTimeout is not defined; CI uses Node 22
• examples require a live Conductor server and .env credentials, which are not present in this checkout

JavaScript counterpart to conductor-oss/python-sdk#445 and conductor-oss/java-sdk#141.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag	Coverage Δ
integration-v4-sm	41.54% <ø> (+0.01%)	⬆️
integration-v5-sdkdev	44.05% <ø> (+0.14%)	⬆️
unit	73.84% <ø> (ø)

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see 1 file with indirect coverage changes

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