Add ETH breakout to strategies and address parse errors

[kenkunz]

Goal

As a Trading Strategy admin, I want our new ETH breakout strategy to be visible (to admins) on the /strategies page, and the related strategy subpages should load without parse errors.

Acceptance criteria

1. New config entry for enzyme-polygon-eth-breakout added to both default .env and production secrets.env
2. The new strategy is displayed for admins only on /strategies index (and not on front page)
3. The strategy overview page loads, and all sub-pages load without errors
4. The strategy's custom icon is shown on both index and strategy header