docs(governance): add @default tag to fullOrganization

Document the default value (false — tenant-scoped) with a @default tag so it
renders as a Default Value entry on the GovernanceFilterOptions docs page.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: ashishupadhyay88

src/models/governance/governance.types.ts

@@ -81,6 +81,8 @@ export interface GovernanceFilterOptions {
    * - `false` → tenant-scoped (explicit, same result)
    * - `true` → org-wide across all tenants; requires an organization admin,
    *   otherwise the request returns 403
+   *
+   * @default false
    */
   fullOrganization?: boolean;
 }