feat(fusion_accounting_bank_rec): 10 JSON-RPC endpoints for OWL widget

All endpoints route through fusion.reconcile.engine via BankRecAdapter
(or directly for engine methods adapter doesn't expose). Uses V19's
type='jsonrpc' (replacement for deprecated type='json'). Auth=user.

Endpoints:
- get_state, list_unreconciled, get_line_detail (read)
- suggest_matches, accept_suggestion (AI surface)
- reconcile_manual, unreconcile, write_off, bulk_reconcile (write)
- get_partner_history (precedent + pattern read)

Tests use HttpCase to exercise the real Werkzeug stack as a Fusion
Accounting administrator. Includes a smoke test for the deferred
write-off path (Task 12) and a negative test confirming auth='user'
rejects anonymous requests. Helper _make_pair shares one bank journal
across pairs to avoid the (code, company) unique-constraint collision
that the default factory would hit on repeat calls.

Verified: 11/11 controller tests pass, 134/134 module tests pass.
Made-with: Cursor

fusion_accounting_bank_rec/__manifest__.py

@@ -1,6 +1,6 @@
 {
     'name': 'Fusion Accounting — Bank Reconciliation',
-    'version': '19.0.1.0.7',
+    'version': '19.0.1.0.8',
     'category': 'Accounting/Accounting',
     'sequence': 28,
     'summary': 'Native V19 bank reconciliation widget with AI confidence scoring + behavioural learning.',