test(invoice): add integration tests for invoice behaviors
- Fix schema ordering: move :journal-entry-line/running-balance to schema.edn
- Add invoice_behaviors_test.clj covering:
- Permission gates (26.5, 26.6, 26.8)
- Lock date blocking (27.1, 27.3)
- New invoice validation (8.1, 8.5)
- Edit invoice (11.1, 11.3)
- Bulk edit (15.4)
- Single/bulk void (16.3, 16.4, 17.1)
- Unvoid restoring from history (18.1)
- Undo autopay (19.1)
- Invoice list filtering (2.6, 2.8, 2.10, 2.14)
- Invoice list sorting (3.5, 3.7, 3.10)
- Invoice list pagination (4.1, 4.3)
- Legacy route redirects (28.1)
- Mock Solr in wrap-setup fixture to prevent Connection refused
- Fix setup-test-data to merge user-provided entities with defaults
- Fix InMemSolrClient.index_documents to handle entity IDs
- Fix ezcater_xls test to use dynamic entity IDs
- Update invoice.md behavior checklist with completed items