feat(freight): track onboarding-phase edit history for companies

Ticket #238 — pre-approval edits and document uploads write straight
to the live company row with no approval gate and, until now, no
trace. Adds an append-only company_revisions log (diffed field
changes, document uploads) recorded from updateProfile and
uploadCompanyDocuments, exposed via GET /companies/:id/revisions and
shown as "Version history" on the backoffice customer detail page.

apps/edr-freight-api/src/migrations/3130000000000-CreateCompanyRevisions.ts

@@ -0,0 +1,48 @@
+import { MigrationInterface, QueryRunner, Table, TableIndex } from 'typeorm';
+
+/**
+ * Append-only audit of company edits made before the company reaches Active
+ * (the onboarding phase) — that write path has no approval gate and, until
+ * now, left no trace of what changed (e.g. a phone number or a document).
+ */
+export class CreateCompanyRevisions3130000000000 implements MigrationInterface {
+  name = 'CreateCompanyRevisions3130000000000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.createTable(
+      new Table({
+        schema: 'freight',
+        name: 'company_revisions',
+        columns: [
+          { name: 'id', type: 'uuid', isPrimary: true, generationStrategy: 'uuid', default: 'gen_random_uuid()' },
+          { name: 'company_id', type: 'uuid' },
+          { name: 'actor_id', type: 'uuid', isNullable: true },
+          { name: 'summary', type: 'varchar', length: '255' },
+          { name: 'changes', type: 'jsonb', default: "'[]'::jsonb" },
+          { name: 'created_at', type: 'timestamptz', default: 'now()' },
+          { name: 'updated_at', type: 'timestamptz', default: 'now()' },
+          { name: 'deleted_at', type: 'timestamptz', isNullable: true },
+        ],
+        foreignKeys: [
+          {
+            columnNames: ['company_id'],
+            referencedSchema: 'freight',
+            referencedTableName: 'companies',
+            referencedColumnNames: ['id'],
+            onDelete: 'CASCADE',
+          },
+        ],
+      }),
+      true,
+    );
+
+    await queryRunner.createIndex(
+      'freight.company_revisions',
+      new TableIndex({ name: 'idx_company_revisions_company', columnNames: ['company_id'] }),
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.dropTable('freight.company_revisions', true);
+  }
+}