SOA as document: replace export with publish workflow

Statements of Applicability are no longer exported as one-off PDFs.
Instead, each SOA owns a persistent document that accumulates versions
over time, following the same publish/approve lifecycle as authored
documents.

Publishing without approvers publishes immediately; publishing with
approvers creates a draft pending approval via the existing quorum
system. SOAs can also store default approvers that are pre-populated in
the publish dialog.

The SOA is removed from the snapshot system — applicability statements
are now queried directly (snapshot_id IS NULL) rather than through
snapshot copies.

A standalone migration script (cmd/migrate-soa-snapshots-to-documents)
converts existing SOA snapshots into documents with proper ProseMirror
content, preserving version history and approval decisions.

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

packages/helpers/src/documents.ts

@@ -14,7 +14,7 @@
 
 type Translator = (s: string) => string;
 
-export const documentTypes = ["OTHER", "GOVERNANCE", "POLICY", "PROCEDURE", "PLAN", "REGISTER", "RECORD", "REPORT", "TEMPLATE"] as const;
+export const documentTypes = ["OTHER", "GOVERNANCE", "POLICY", "PROCEDURE", "PLAN", "REGISTER", "RECORD", "REPORT", "TEMPLATE", "STATEMENT_OF_APPLICABILITY"] as const;
 
 export function getDocumentTypeLabel(__: Translator, type: string) {
     switch (type) {
@@ -36,6 +36,19 @@ export function getDocumentTypeLabel(__: Translator, type: string) {
             return __("Report");
         case "TEMPLATE":
             return __("Template");
+        case "STATEMENT_OF_APPLICABILITY":
+            return __("Statement of Applicability");
+    }
+}
+
+export const documentWriteModes = ["AUTHORED", "GENERATED"] as const;
+
+export function getDocumentWriteModeLabel(__: Translator, writeMode: string) {
+    switch (writeMode) {
+        case "AUTHORED":
+            return __("Authored");
+        case "GENERATED":
+            return __("Generated");
     }
 }