Suspend and activate Cockpit process instances

[hauptmedia]

Summary

• add REST bindings and state for live process instance suspension by id
• show process instance state in the Cockpit instance detail header
• add Suspend/Activate actions for live process instances while keeping history details read-only
• add localized labels and API/page coverage for the suspension workflow
• clean up existing lint issues in the touched Processes page

Reference

• Operaton REST OpenAPI, Activate/Suspend Process Instance By Id: https://github.com/operaton/operaton/blob/main/engine-rest/engine-rest-openapi/src/main/templates/paths/process-instance/%7Bid%7D/suspended/put.ftl

Verification

• node -e "JSON.parse(require('fs').readFileSync('public/locales/en-US/translation.json','utf8')); JSON.parse(require('fs').readFileSync('public/locales/de-DE/translation.json','utf8')); console.log('locale JSON ok')"
• npx eslint src/api/resources/process_instance.js src/api/resources/process_instance.test.js src/pages/Processes.jsx src/pages/Processes.test.jsx
• npx vitest run src/api/resources/process_instance.test.js src/pages/Processes.test.jsx
• npx vitest run --maxWorkers=4
• npm run build
• browser smoke at http://127.0.0.1:5175/processes/proc:1/instances/inst-9999/vars: reached login boundary with title Operaton and no console errors

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud