Ouroboros Devtools

devtools/ contains operator-side and benchmark support code that should be versioned with Ouroboros without becoming part of the runtime core.

Rules:

Generated logs, datasets, run outputs, Docker layers, and secrets do not live here.
Default benchmark outputs go under /Users/anton/Ouroboros/bench_runs/.
Runtime modules must not import devtools.
This is not an immune-system bypass: touched files are reviewed normally.
Promote code out of devtools only through a separate reviewed runtime plan.