ci: lint (required) has been red on main since 83a6767ff — cargo fmt --check fails, and it skips every later lint step

[proggeramlug]

lint is a required check and it has been failing on main since 83a6767ff ("GC memory: shape-key typed layouts (#6893) + major-GC pacing; don't link CoreFoundation in every binary (#6939)"). The failing step is Check formatting (cargo fmt --all -- --check); every step after it in the job is skipped, so Audit workspace architecture, Public benchmark evidence freshness, File size limit, GC store-site inventory and Address-classification audit are not running at all right now.

Because it is a required context, this reds every open PR regardless of that PR's contents. Noticed on #6954, whose diff contains zero .rs files.

Repro

$ git checkout main && git log --oneline -1
83a6767ff GC memory: shape-key typed layouts (#6893) + major-GC pacing; …
$ cargo fmt --all -- --check

Two hunks, both in files last touched by 83a6767ff:

Diff in crates/perry-runtime/src/gc/mod.rs:135:
-        let outcome = gc_collect_full_mark_sweep_with_trigger(GcTriggerSnapshot::capture(trigger.kind));
+        let outcome =
+            gc_collect_full_mark_sweep_with_trigger(GcTriggerSnapshot::capture(trigger.kind));

Diff in crates/perry-runtime/src/temporal/now.rs:9:
 use super::{alloc_temporal_cell, TemporalValue};
 use temporal_rs::host::{HostClock, HostHooks, HostTimeZone};
+use temporal_rs::now::Now;
 use temporal_rs::provider::TimeZoneProvider;
 use temporal_rs::unix_time::EpochNanoseconds;
-use temporal_rs::now::Now;

Fix is cargo fmt --all on main. Filing rather than folding it into an unrelated PR, since the fix belongs on main — patching it in one branch would unblock only that branch while every other PR stays red.

Worth a look at how it landed green: 83a6767ff is on main, so either the check was bypassed or it was already red when that PR merged.

[proggeramlug]

Fix is already up: #6955 — style: restore rustfmt formatting on main, formatting-only, exactly the two hunks named here (gc/mod.rs:135, temporal/now.rs:9 +2 more sites in that file). It needs no build, so it can land immediately.

Amplifying the second consequence noted above, because it is the bigger one: Check formatting is the first step of the lint job, so every later step in that job has been skipped repo-wide — Audit workspace architecture, Public benchmark evidence freshness, File size limit, GC store-site inventory, Address-classification audit. Those gates have not run on any PR since the drift landed. Merging #6955 will unmask them, so expect some of them to go red immediately afterwards — that is the gates resuming, not new breakage. (A #6948 agent already ran the file-size gate locally: it exits 1 on five files, none in its diff — object/mod.rs was pushed over the cap by #6939.)

[proggeramlug]

Resolved on main by #7042 (4af0e0f8f). I also re-ran cargo fmt --all -- --check at current origin/main (c5ab36b86) and it passes, so the formatting failure described here no longer prevents the later lint steps from running.