Add a new 'slack' target type that sends webhook events as formatted
messages to any Slack-compatible incoming webhook URL (Slack, Mattermost,
and other compatible services).
Messages include event metadata (method, content type, timestamp, body
size) and the payload pretty-printed in a code block. JSON payloads are
automatically formatted with indentation; non-JSON payloads are shown as
raw text. Large payloads are truncated at 3500 chars.
Changes:
- Add TargetTypeSlack constant to model_target.go
- Add SlackTargetConfig struct and deliverSlack method to delivery engine
- Add FormatSlackMessage (exported) for building Slack message text
- Route slack targets in processDelivery switch
- Handle slack type in HandleTargetCreate with webhook_url config
- Add slack option to source_detail.html target creation form
- Add comprehensive tests (config parsing, message formatting, delivery
success/failure, routing)
- Update README with slack target documentation
Add toggle (activate/deactivate) and delete buttons for individual
entrypoints and targets on the webhook detail page. Each action is a
POST form submission with ownership verification.
New routes:
POST /source/{id}/entrypoints/{entrypointID}/delete
POST /source/{id}/entrypoints/{entrypointID}/toggle
POST /source/{id}/targets/{targetID}/delete
POST /source/{id}/targets/{targetID}/toggle
