tests: thread cost_allocation + runway_config into AppState literals
The two integration-test harnesses (tests/harness/mod.rs and
tests/load/runner.rs) build AppState by-field, so the v0.10.0 commit
that added cost_allocation and runway_config to AppState broke
`cargo test --release` even though `cargo test --lib` stayed green.
Both fields default cheaply; tests don't depend on real values.
Author: Max Johnson <me@maxj.phd> · 2026-06-04 18:20 UTC