ci(actions): bump actions/upload-artifact from 4 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/chaos.yml

@@ -31,7 +31,7 @@ jobs:
 
       - name: Upload chaos results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: chaos-results
           path: chaos/

.github/workflows/ci.yml

@@ -159,7 +159,7 @@ jobs:
           npm run test:shard
 
       - name: Upload coverage report
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: coverage-report-${{ matrix.shard }}
           path: coverage/lcov.info
@@ -384,7 +384,7 @@ jobs:
 
       - name: Upload bundle size report
         if: github.event_name != 'pull_request' && github.ref == 'refs/heads/main'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: bundle-size-report-${{ github.sha }}
           path: bundle-size-report.json

.github/workflows/invariant-tests.yml

@@ -58,7 +58,7 @@ jobs:
       # ── Upload test results as artifact ───────────────────────────────
       - name: Upload invariant test results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: invariant-test-results
           path: contracts/invariant-test-results.txt
@@ -95,7 +95,7 @@ jobs:
 
       - name: Upload extended fuzz results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: extended-fuzz-results
           path: contracts/extended-fuzz-results.txt