feat(fusion_accounting_bank_rec): inherit account.bank.statement.line + account.reconcile.model

Task 17 — Add Phase 1 widget compute fields and AI hooks:
- account.bank.statement.line: fusion_top_suggestion_id (m2o, unstored),
  fusion_confidence_band (selection, unstored), bank_statement_attachment_ids
  (one2many compute, mirrors Enterprise's surface field for the OWL widget).
- account.reconcile.model: fusion_ai_confidence_threshold (float).
- Bumps manifest 19.0.1.0.3 → 19.0.1.0.4.

V19 note: dropped @api.depends('id') on _compute_top_suggestion (NotImplementedError
in V19); compute is on-demand for unstored field anyway.

Made-with: Cursor

fusion_accounting_bank_rec/models/__init__.py

@@ -2,3 +2,5 @@ from . import fusion_reconcile_pattern
 from . import fusion_reconcile_precedent
 from . import fusion_reconcile_suggestion
 from . import fusion_bank_rec_widget
+from . import account_bank_statement_line
+from . import account_reconcile_model