Migrates `ingest_per_actor_admission_cap_returns_429` from env-var
override to direct `WorkloadController::new(1, ...)` construction via
`AppState::new_with_workload`. Removes the `EnvGuard` and the
`#[serial]` annotation that paired with it.
Why correct by design (AGENTS.md rule 9): the previous round's matrix
fix (commit 8bd9a5f) shielded the matrix from this test's env
mutation, but the broader bug class — "test A's process-wide env
mutation can leak into any test B that calls
`AppState::open` / `WorkloadController::from_env()`" — was still
reachable by any future test that didn't think to opt out. Closing
the class at the source: this test no longer mutates global state at
all, so no other test needs to defend against it.
Net effect:
- This test no longer needs `#[serial]` (was the only reason it was
marked) — runs in parallel with the rest of the suite.
- The matrix's defensive `with_defaults()` construction (commit
8bd9a5f) remains correct but is no longer required for correctness;
it's now a "belt and suspenders" guard against any FUTURE
env-mutating test.
Verified locally: both tests pass when run together; full server
suite (44 tests) green.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
3ad359db8b