Enable parallel execution for rapid PR merges by including commit SHA in concurrency groups

This allows multiple commits to run simultaneously without canceling each other, improving throughput when PRs are merged in quick succession.

Author: markpollack

.github/workflows/main-push-fast.yml

@@ -24,7 +24,7 @@ jobs:
     permissions:
       contents: read
     concurrency:
-      group: ${{ github.workflow }}-${{ github.ref }}
+      group: ${{ github.workflow }}-${{ github.ref }}-${{ github.sha }}
       cancel-in-progress: true
     steps:
       - uses: actions/checkout@v4

.github/workflows/maintenance-fast.yml

@@ -12,7 +12,7 @@ jobs:
     permissions:
       contents: read
     concurrency:
-      group: ${{ github.workflow }}-${{ github.ref }}
+      group: ${{ github.workflow }}-${{ github.ref }}-${{ github.sha }}
       cancel-in-progress: true
     steps:
       - uses: actions/checkout@v4