ci: skip draft PRs in CI and OSV scanner workflows

Author: Val Redchenko

.github/workflows/ci.yml

@@ -10,6 +10,7 @@ jobs:
   webui:
     name: WebUI Lint & Typecheck
     runs-on: ubuntu-latest
+    if: github.event.pull_request.draft == false || github.event_name != 'pull_request'
     defaults:
       run:
         working-directory: webui

.github/workflows/osv-scanner.yml

@@ -18,7 +18,7 @@ permissions:
 
 jobs:
   scan-pr:
-    if: github.event_name == 'pull_request' || github.event_name == 'merge_group'
+    if: (github.event_name == 'pull_request' && github.event.pull_request.draft == false) || github.event_name == 'merge_group'
     uses: google/osv-scanner-action/.github/workflows/osv-scanner-reusable-pr.yml@v2.3.2
 
   scan-scheduled: