Use full runner pool for source test lanes

.gitea/workflows/cicd.yaml

@@ -39,7 +39,7 @@ concurrency:
 jobs:
   publish-base:
     name: Build and Publish CICD Base Image
-    runs-on: ubuntu-act
+    runs-on: ubuntu-act-8gb
     timeout-minutes: 35
     outputs:
       base_hash: ${{ steps.base-state.outputs.base_hash }}
@@ -354,9 +354,8 @@ jobs:
 
   precommit-tests:
     name: Pre-commit Checks
-    # Pin one source-check lane to the 8GB pool so source checks can fan out
-    # across both runner pools instead of serializing behind a single label.
-    runs-on: ubuntu-act-8gb
+    # Source-level checks should be able to use the full ubuntu-act pool.
+    runs-on: ubuntu-act
     timeout-minutes: 30
     needs: build_cicd
     steps:
@@ -401,9 +400,8 @@ jobs:
 
   frontend-tests:
     name: Frontend Tests
-    # Pin one source-check lane to the 8GB pool so source checks can fan out
-    # across both runner pools instead of serializing behind a single label.
-    runs-on: ubuntu-act-8gb
+    # Source-level checks should be able to use the full ubuntu-act pool.
+    runs-on: ubuntu-act
     timeout-minutes: 25
     needs: build_cicd
     steps: