feat(fusion_accounting_core): add computed coexistence group + recompute hooks

group_fusion_show_when_enterprise_absent has membership = all internal
users iff no Enterprise accounting module is installed. Membership is
recomputed on module install/uninstall via overrides on ir.module.module.
Used by Phase 1 fusion_bank_rec menus to auto-hide when Enterprise is
active and auto-appear after Enterprise uninstall.

Made-with: Cursor

fusion_accounting_core/__manifest__.py

@@ -1,6 +1,6 @@
 {
     'name': 'Fusion Accounting Core',
-    'version': '19.0.1.0.1',
+    'version': '19.0.1.0.2',
     'category': 'Accounting/Accounting',
     'sequence': 24,
     'summary': 'Shared base for the Fusion Accounting sub-module suite (security, shared schema, runtime helpers).',
@@ -30,4 +30,5 @@ Built by Nexa Systems Inc.
     'installable': True,
     'application': False,
     'license': 'OPL-1',
+    'post_init_hook': 'post_init_hook',
 }