ci: drop the schedule triggers, race and fuzz run on dispatch alone

Assisted-by: GLM 5.3

.gitea/workflows/fuzz.yml

@@ -1,20 +1,16 @@
-# Fuzz smoke, Go. A nightly time-boxed run of the fuzz targets, and a hand
-# dispatch when a change asks for it.
+# Fuzz smoke, Go. Dispatched by hand when a change asks for it.
 #
 # Fuzzing is exploration, so it never belongs to the push pipeline; a 30 second
-# smoke per target, run nightly, is the compromise that catches a new crash
-# within a day without holding the shared box. The targets run the seeds and
-# whatever the corpus has gathered; a failure leaves its crashing input in
-# testdata/fuzz, which the ordinary suite then reproduces on every push.
+# smoke per target on a hand dispatch checks a change without holding the
+# shared box. The targets run the seeds and whatever the corpus has gathered; a
+# failure leaves its crashing input in testdata/fuzz, which the ordinary suite
+# then reproduces on every push.
 #
 # Every step is one command, so the step that fails is the gate that failed.
 name: Fuzz
 
 on:
   workflow_dispatch:
-  schedule:
-    # Nightly at 03:30 UTC, after the race sweep has had the box first.
-    - cron: "30 3 * * *"
 
 env:
   # One core: parallelism buys no speed here and costs memory the box does not have.

.gitea/workflows/race.yml

@@ -1,20 +1,16 @@
-# Race, Go. Dispatched by hand and swept nightly on a schedule.
+# Race, Go. Dispatched by hand.
 #
 # The race detector roughly doubles both time and memory, which the shared runner box
 # cannot afford on every push. Locally it belongs to `just gates`, which runs it once
-# per task; here it is an explicit decision rather than a routine. The nightly
-# schedule runs on the repository's default branch, so it sweeps the released
-# line; development carries its race gate on every push through `just gates`
-# and the hand dispatch when a change asks for one.
+# per task; here it is an explicit decision rather than a routine, a hand dispatch
+# when a change asks for one. Development carries its race gate on every push through
+# that local gate.
 #
 # Every step is one command, so the step that fails is the gate that failed.
 name: Race
 
 on:
   workflow_dispatch:
-  schedule:
-    # Nightly at 03:00 UTC, the quietest hours of the shared box.
-    - cron: "0 3 * * *"
 
 env:
   # One core: parallelism buys no speed here and costs memory the box does not have.

.gitea/workflows/test.yml

@@ -2,8 +2,8 @@
 #
 # The gates are the ones the justfile's `gates` recipe runs, minus race: the shared
 # runner box cannot afford the race detector on every push. Race has its own
-# pipeline, dispatched by hand and swept nightly, and the local `just gates`
-# runs it once per task. The box is one core and 2 GB beside Gitea, so
+# pipeline, dispatched by hand, and the local `just gates` runs it once per
+# task. The box is one core and 2 GB beside Gitea, so
 # parallelism is bounded on purpose and everything runs in one job. Extra jobs would
 # duplicate the checkout, the Go setup and the dependency download three times without
 # buying any parallelism.