run-sweep: add non-canary-full-sweep-enabled label (full sweep, no canary)

New label that triggers the full sweep without running the canary gate.
Acts as an escape hatch when:
- The canary is known to be flaky / unreliable for this config
- The user wants the full sweep without the canary delay
- The canary's chosen entry is not a representative smoke test

Behavior matrix:
  sweep-enabled                  - trims to max(conc) per parallelism, with canary
  full-sweep-enabled             - full intermediate conc sweep, with canary
  non-canary-full-sweep-enabled  - full intermediate conc sweep, NO canary

How it works (no changes to existing label semantics):
- Setup gate triggers on any of the 3 labels (was: 2)
- canary-select gate still requires `full-sweep-enabled` (exact array match,
  so `non-canary-full-sweep-enabled` does NOT match) → canary skips → all
  fan-out jobs run on full search space via the `== 'skipped'` allowlist
- TRIM_CONC env is unchanged — only `sweep-enabled` enables trim, so the
  new label correctly behaves as "full sweep"
- The reject-conflicting-labels step is now a 3-way exclusion: at most
  one of {sweep-enabled, full-sweep-enabled, non-canary-full-sweep-enabled}
- The same gate updates apply to the comment-visualizer job
- Concurrency-group filter excludes the new label too so toggling it
  uses the same `'active'` group key as the other sweep labels

Author: Oseltamivir

.github/workflows/run-sweep.yml

@@ -8,6 +8,7 @@ concurrency:
           (github.event.action == 'labeled' || github.event.action == 'unlabeled') &&
           github.event.label.name != 'sweep-enabled' &&
           github.event.label.name != 'full-sweep-enabled' &&
+          github.event.label.name != 'non-canary-full-sweep-enabled' &&
           github.run_id ||
           'active'
         }}
@@ -39,7 +40,8 @@ jobs:
             (
               (github.event.action != 'labeled' && github.event.action != 'unlabeled') ||
               github.event.label.name == 'sweep-enabled' ||
-              github.event.label.name == 'full-sweep-enabled'
+              github.event.label.name == 'full-sweep-enabled' ||
+              github.event.label.name == 'non-canary-full-sweep-enabled'
             )
         steps:
             - name: Checkout code
@@ -61,12 +63,14 @@ jobs:
               !github.event.pull_request.draft &&
               (
                 contains(github.event.pull_request.labels.*.name, 'sweep-enabled') ||
-                contains(github.event.pull_request.labels.*.name, 'full-sweep-enabled')
+                contains(github.event.pull_request.labels.*.name, 'full-sweep-enabled') ||
+                contains(github.event.pull_request.labels.*.name, 'non-canary-full-sweep-enabled')
               ) &&
               (
                 (github.event.action != 'labeled' && github.event.action != 'unlabeled') ||
                 github.event.label.name == 'sweep-enabled' ||
-                github.event.label.name == 'full-sweep-enabled'
+                github.event.label.name == 'full-sweep-enabled' ||
+                github.event.label.name == 'non-canary-full-sweep-enabled'
               )
             ) ||
             (
@@ -85,10 +89,13 @@ jobs:
             - name: Reject conflicting sweep labels
               if: >-
                   github.event_name == 'pull_request' &&
-                  contains(github.event.pull_request.labels.*.name, 'sweep-enabled') &&
-                  contains(github.event.pull_request.labels.*.name, 'full-sweep-enabled')
+                  (
+                    (contains(github.event.pull_request.labels.*.name, 'sweep-enabled') && contains(github.event.pull_request.labels.*.name, 'full-sweep-enabled')) ||
+                    (contains(github.event.pull_request.labels.*.name, 'sweep-enabled') && contains(github.event.pull_request.labels.*.name, 'non-canary-full-sweep-enabled')) ||
+                    (contains(github.event.pull_request.labels.*.name, 'full-sweep-enabled') && contains(github.event.pull_request.labels.*.name, 'non-canary-full-sweep-enabled'))
+                  )
               run: |
-                  echo "::error::PR has both 'sweep-enabled' and 'full-sweep-enabled' labels. Remove one — 'full-sweep-enabled' runs the full intermediate concurrency sweep; 'sweep-enabled' trims to max(conc) per parallelism config."
+                  echo "::error::PR has multiple conflicting sweep labels. Pick exactly one of: 'sweep-enabled' (trims to max(conc) per parallelism config), 'full-sweep-enabled' (full intermediate concurrency sweep, with canary gate), or 'non-canary-full-sweep-enabled' (full sweep, no canary gate)."
                   exit 1
 
             - name: Checkout code
@@ -726,12 +733,14 @@ jobs:
             !github.event.pull_request.draft &&
             (
               contains(github.event.pull_request.labels.*.name, 'sweep-enabled') ||
-              contains(github.event.pull_request.labels.*.name, 'full-sweep-enabled')
+              contains(github.event.pull_request.labels.*.name, 'full-sweep-enabled') ||
+              contains(github.event.pull_request.labels.*.name, 'non-canary-full-sweep-enabled')
             ) &&
             (
               (github.event.action != 'labeled' && github.event.action != 'unlabeled') ||
               github.event.label.name == 'sweep-enabled' ||
-              github.event.label.name == 'full-sweep-enabled'
+              github.event.label.name == 'full-sweep-enabled' ||
+              github.event.label.name == 'non-canary-full-sweep-enabled'
             )
         runs-on: ubuntu-latest
         permissions: