Fix: Add 'suspend' to API action type validation

[bk-ty]

Summary

The suspend action type is fully supported at runtime (runJobAction_suspend() in lib/action.js), but the API input validation in validateActionData() (lib/api.js) rejects it as an unknown type. This prevents creating or updating events with suspend actions via the API (create_event/v1, update_event/v1), even though they work correctly when configured through the UI.

Changes

• Added case 'suspend': to the action type validation switch in lib/api.js, alongside the other recognized types (email, web_hook, run_event, channel, plugin, disable, delete, etc.)

Reproduction

1. Create an event with a suspend action via the API:

curl -X POST http://localhost:3012/api/app/create_event/v1 \
  -H "X-API-Key: YOUR_KEY" \
  -d '{"title":"Test","enabled":true,"category":"general","targets":["main"],"plugin":"shellplug","params":{"script":"echo hi"},"actions":[{"type":"suspend","condition":"start","enabled":true}]}'

2. Before fix: Returns "Unknown type" error
3. After fix: Event creates successfully; suspend action works as expected at runtime

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Intended for upstream PR to pixlcore/xyops