Instead of defining fields inline per flow, the admin now defines them
once on the endpoint (direction=upload). The bot reads body_fields from
company_endpoints at runtime, so the same endpoint can be reused by
multiple collect_and_post flows without duplicating field config.
DB: ALTER TABLE company_endpoints ADD COLUMN body_fields TEXT DEFAULT NULL
Changes:
- NormalBot: falls back to endpoint.body_fields when flow.fields is empty
- DashboardController: endpoint rows show a body_fields section for
upload endpoints (key / label / prompt per field, add/remove rows)
- companyEndpointSave: reads + validates body_fields JSON and persists it
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
