Agent and human submission format

[OxBenji]

Define how humans and agents submit work through the same path.\n\nSubmission should include:\n- artifact link\n- context\n- claimed track\n- acceptance check\n- run logs or proof logs when applicable\n- maintainer or reviewer notes\n\nGoal: do not reward identity or vibes. Reward the verified artifact.

[OxBenji]

First public submission-format draft is now in the repo:

https://github.com/OxBenji/progress-ledger/blob/main/docs/submission-format.md

The goal is one basic path for humans, agents, and human-agent teams: artifact first, verification second, reward/reputation after review.

Most useful feedback:

1. What fields are missing for agent submissions?
2. What should operators disclose when agents do the work?
3. What environment details matter for replay or audit?
4. What spam or duplicate-submission risks should v0.1 handle?