feat(agentic): replay api-time overlap barriers

[cquil11]

Summary

• infer explicit cross-stream predecessor frontiers from Weka [t, t + api_time] intervals
• launch branches whose capture intervals overlap from the parent request start
• enforce fan-out/join barriers during accelerated warmup and profiling without a scalar peak semaphore

Validation

• deterministic A/B/C-before-D barrier and edge-case tests
• focused unit/component suites
• local mock-server subprocess with repeated conversation recycling and clean warmup-to-profile handoff
• pre-commit

The full unit suite reached 4,569 passing tests before stopping on the existing offline test-model tokenizer fixture failure.

[github-actions]

Try out this PR

Quick install:

pip install --upgrade --force-reinstall git+https://github.com/ai-dynamo/aiperf.git@37b35a7e0dc497ec2b5b0e84d4f5c3d112c4d0e3

Recommended with virtual environment (using uv):

uv venv --python 3.12 && source .venv/bin/activate
uv pip install --upgrade --force-reinstall git+https://github.com/ai-dynamo/aiperf.git@37b35a7e0dc497ec2b5b0e84d4f5c3d112c4d0e3

---

Last updated for commit: 37b35a7 • Browse code

[github-actions]

Fern Docs Preview: generation failed — see the Actions log for details. This does not block merge; ask a maintainer to retry if needed.