Add document webhook events

Add a resource-oriented set of webhook events for the document
lifecycle. Each event carries the document plus only the sub-resource
it concerns (version, signature or approval).

Events:
- document.created / updated / archived / unarchived / deleted
- document.version.created / updated / published / rejected / deleted
- document.version.signature.requested / signed / cancelled
- document.version.approval.requested / approved / rejected / voided

Wires the new types through the migration, Go enum, GraphQL schema,
CLI, n8n nodes and the console webhooks settings UI.

Signed-off-by: Sacha Al Himdani <sacha@probo.com>

pkg/cmd/webhook/shared/events.go

@@ -27,4 +27,22 @@ var ValidEvents = []string{
 	"OBLIGATION_CREATED",
 	"OBLIGATION_UPDATED",
 	"OBLIGATION_DELETED",
+	"DOCUMENT_CREATED",
+	"DOCUMENT_UPDATED",
+	"DOCUMENT_ARCHIVED",
+	"DOCUMENT_UNARCHIVED",
+	"DOCUMENT_DELETED",
+	"DOCUMENT_VERSION_CREATED",
+	"DOCUMENT_VERSION_UPDATED",
+	"DOCUMENT_VERSION_PUBLISHED",
+	"DOCUMENT_VERSION_REJECTED",
+	"DOCUMENT_VERSION_DELETED",
+	"DOCUMENT_VERSION_SIGNATURE_REQUESTED",
+	"DOCUMENT_VERSION_SIGNATURE_SIGNED",
+	"DOCUMENT_VERSION_SIGNATURE_CANCELLED",
+	"DOCUMENT_VERSION_APPROVAL_QUORUM_REQUESTED",
+	"DOCUMENT_VERSION_APPROVAL_QUORUM_UPDATED",
+	"DOCUMENT_VERSION_APPROVAL_QUORUM_APPROVED",
+	"DOCUMENT_VERSION_APPROVAL_QUORUM_REJECTED",
+	"DOCUMENT_VERSION_APPROVAL_QUORUM_VOIDED",
 }