pj 54e33643b6 feat(trace): record arm membership and host in meta.json ...

meta.json recorded the seed but not which picker ran, how it was configured,
what budget it was given, or which machine produced it. A directory of runs
cannot be attributed to an experiment cell without those, which makes any
factorial computed from such a directory unanalysable after the fact.

Claude-Session: https://claude.ai/code/session_01A5KmftdEJ49A9z5mF5ESrX

2026-08-12 18:12:28 +05:30

..

writer_test.go

feat(trace): record arm membership and host in meta.json

2026-08-12 18:12:28 +05:30

writer.go

feat(trace): record arm membership and host in meta.json

2026-08-12 18:12:28 +05:30