CI: tell e2e:full label events by the PR's labels

Gitea leaves github.event.label empty.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE

.gitea/workflows/ci.yml

@@ -25,12 +25,14 @@ on:
 #
 # Gitea triggers on `labeled` but hands the workflow its own name for the
 # action, `label_updated` (and `synchronized` for a push), so each check
-# below accepts both.
+# below accepts both. Nor does it say which label was added
+# (`github.event.label` is empty), so a label event counts when the PR now
+# has e2e:full; adding another label to an e2e:full PR restarts its run.
 concurrency:
   group: >-
     ${{ github.workflow }}-${{ github.head_ref || github.ref }}${{
     ((github.event.action == 'labeled' || github.event.action == 'label_updated')
-    && github.event.label.name != 'e2e:full')
+    && !contains(github.event.pull_request.labels.*.name, 'e2e:full'))
     && format('-label-{0}', github.run_id) || '' }}
   cancel-in-progress: true
 
@@ -44,12 +46,12 @@ jobs:
     steps:
       - run: |
           echo "action=[${{ github.event.action }}] label=[${{ github.event.label.name }}] event=${{ github.event_name }}"
-          echo "group=[${{ github.workflow }}-${{ github.head_ref || github.ref }}${{ ((github.event.action == 'labeled' || github.event.action == 'label_updated') && github.event.label.name != 'e2e:full') && format('-label-{0}', github.run_id) || '' }}]"
+          echo "group=[${{ github.workflow }}-${{ github.head_ref || github.ref }}${{ ((github.event.action == 'labeled' || github.event.action == 'label_updated') && !contains(github.event.pull_request.labels.*.name, 'e2e:full')) && format('-label-{0}', github.run_id) || '' }}]"
 
   checks:
     if: >-
       (github.event.action != 'labeled' && github.event.action != 'label_updated')
-      || github.event.label.name == 'e2e:full'
+      || contains(github.event.pull_request.labels.*.name, 'e2e:full')
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -107,7 +109,7 @@ jobs:
     if: >-
       github.event_name != 'push'
       && ((github.event.action != 'labeled' && github.event.action != 'label_updated')
-      || github.event.label.name == 'e2e:full')
+      || contains(github.event.pull_request.labels.*.name, 'e2e:full'))
     needs: checks
     runs-on: ubuntu-latest
     timeout-minutes: 90