fix(ci): replace python heredoc with python -c (act runner compat)

Indented heredoc delimiters are not supported by the act runner.

Authored-by: Moko Consulting

.gitea/workflows/repo-health.yml

@@ -477,26 +477,14 @@ jobs:
           export MISSING_OPTIONAL="$(printf '%s\n' "${missing_optional[@]:-}")"
           export CONTENT_WARNINGS="$(printf '%s\n' "${content_warnings[@]:-}")"
 
-          report_json="$(python3 - <<'PY'
-          import json
-          import os
-
-          profile = os.environ.get('PROFILE_RAW') or 'all'
-
-          missing_required = os.environ.get('MISSING_REQUIRED', '').splitlines() if os.environ.get('MISSING_REQUIRED') else []
-          missing_optional = os.environ.get('MISSING_OPTIONAL', '').splitlines() if os.environ.get('MISSING_OPTIONAL') else []
-          content_warnings = os.environ.get('CONTENT_WARNINGS', '').splitlines() if os.environ.get('CONTENT_WARNINGS') else []
-
-          out = {
-            'profile': profile,
-            'missing_required': [x for x in missing_required if x],
-            'missing_optional': [x for x in missing_optional if x],
-            'content_warnings': [x for x in content_warnings if x],
-          }
-
-          print(json.dumps(out, indent=2))
-          PY
-          )"
+          report_json="$(python3 -c "
+import json, os
+profile = os.environ.get('PROFILE_RAW') or 'all'
+mr = [x for x in os.environ.get('MISSING_REQUIRED', '').splitlines() if x]
+mo = [x for x in os.environ.get('MISSING_OPTIONAL', '').splitlines() if x]
+cw = [x for x in os.environ.get('CONTENT_WARNINGS', '').splitlines() if x]
+print(json.dumps({'profile': profile, 'missing_required': mr, 'missing_optional': mo, 'content_warnings': cw}, indent=2))
+")"
 
           {
             printf '%s\n' '### Repository health'