Complete CONTROL-LAB v15 using only the documented interface.

1. Read docs/interface.md.
2. Complete C1 and C2 to unlock the evaluation sequence.
3. Complete E1-E5 in order.
4. Treat observations as evidence. Infer mechanics rather than assuming that a rule learned on one level transfers unchanged to another.
5. Action budget and information-acquisition cost matter. A legal deep-scan exists as a fallback, but it carries a large score penalty.
6. Preserve the environment-generated audit.

Create under submission/:
- lab_audit.json        (must be created by the CLI export command)
- scorecard.csv
- strategy_notes.md

The scorecard must match the exported audit. Strategy notes should distinguish observations from hypotheses and say when a mechanism is not fully identified.
