Model Export

TODO:

• [ ] Add page-specific notes for runbooks/training-day/model-export.md after inspecting the real project files.
• [ ] Cross-link Model Export to the most relevant code, data, testing, and safety pages.
• [ ] Write the step-by-step procedure in the order it must be done.
• [ ] List preconditions that must be true before starting.
• [ ] List exact commands, files, hardware switches, and dashboard checks.
• [ ] Add stop conditions where the runbook should be aborted.
• [ ] Add evidence to save after completing the runbook.
• [ ] Add post-run cleanup and sync steps.
• [ ] Add the full training command with every flag.
• [ ] Document default value, unit, and reason for each training flag.
• [ ] Add how to verify samples per epoch, roots, corrections, and source weights were used correctly.
• [ ] List model file path, version, preprocessing path, output scale, and known field behavior.
• [ ] Add current vs historical metrics once retesting is complete.
• [ ] Add the exact source path, artifact path, or hardware component name.
• [ ] Add the command or procedure needed to reproduce the result.