ci: test both push and pull_request events

I think we have a bug with pull_request events so...

.forgejo/workflows/check.yml

@@ -1,5 +1,7 @@
 on:
   push:
+    branches: [main]
+  pull_request:
 jobs:
   check:
     runs-on: nixos
@@ -14,9 +16,10 @@ jobs:
           nix --version
           # shellcheck disable=SC2016
           nix build --print-build-logs '.#checks.x86_64-linux.${{ matrix.check }}'
-  report-size:
+  report-size-push:
     runs-on: nixos
     needs: check
+    if: github.event_name == 'push'
     steps:
       - uses: "https://git.salame.cl/actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683" # v4
       - run: nix --version
@@ -24,18 +27,38 @@ jobs:
         uses: ./
         with:
           # Create a comment on the associated PR
-          comment-on-pr: ${{ github.ref_name != 'main' }}
+          comment-on-pr: 'false'
+          # Generate artifacts on main (to speed up comparisons)
+          # generate-artifact: ${{ github.ref_name == 'main' }}
+          # Always generate artifacts for testing purposes
+          generate-artifact: 'true'
+          # This job's name (so we can find the previous artifacts)
+          job-name: report-size-push
+  report-size-pr:
+    runs-on: nixos
+    needs: check
+    if: github.event_name == 'pull_request'
+    steps:
+      - uses: "https://git.salame.cl/actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683" # v4
+      - run: nix --version
+      - name: Create Size Report
+        uses: ./
+        with:
+          # Create a comment on the associated PR
+          comment-on-pr: 'true'
           # Generate artifacts on main (to speed up comparisons)
           # generate-artifact: ${{ github.ref_name == 'main' }}
           # Always generate artifacts for testing purposes
           generate-artifact: 'true'
           # Generate comparisons to main
           do-comparison: 'true'
-          # This job's name (so we can find the artifacts)
-          job-name: report-size
-  report-download-check:
+          # Get the previous artifacts from report-size-push (since those run on main)
+          job-name: report-size-push
+          artifact-name: report-pr.json
+  report-download-check-push:
     runs-on: nixos
-    needs: report-size
+    needs: report-size-push
+    if: github.event_name == 'push'
     steps:
       - name: Download previous report
         uses: https://git.salame.cl/actions/download-artifact@d8d0a99033603453ad2255e58720b460a0555e1e # v4
@@ -44,3 +67,15 @@ jobs:
       - name: Verify report exists
         run: |
           cat report.json
+  report-download-check-pr:
+    runs-on: nixos
+    needs: report-size-pr
+    if: github.event_name == 'pull_request'
+    steps:
+      - name: Download previous report
+        uses: https://git.salame.cl/actions/download-artifact@d8d0a99033603453ad2255e58720b460a0555e1e # v4
+        with:
+          name: report-pr.json
+      - name: Verify report exists
+        run: |
+          cat report-pr.json