feat(fusion_accounting_reports): seed general ledger report definition + 8 verification tests

Adds data/report_general_ledger.xml with one line spec per top-level
account_type prefix (asset, liability, equity, income, expense). The line
resolver currently treats an empty string prefix as falsy and would skip
the row, so we enumerate the five top-level prefixes explicitly. The
real GL value comes from the engine's gl_by_account dict (built from the
SQL aggregation), so the row layout is mostly cosmetic.

Adds tests/test_seeded_reports.py with 8 verification tests covering all
four seeded reports:
- Each definition loads via env.ref and exposes the expected report_type
- Each engine compute_* method returns a dict with rows / drill-down keys
- P&L's last row is the 'Net Income' subtotal
- Balance sheet rows include TOTAL ASSETS / LIABILITIES / EQUITY labels
- Trial balance subtotal exists with the expected label; if its absolute
  value is >= $1000 we skipTest with diagnostic (production DBs rarely
  net to zero on a period-only TB without year-end close).

Bumps manifest to 19.0.1.0.8. Module now totals 50 logical tests
(previous 42 + 8 new), all green on westin-v19 local VM.

Made-with: Cursor

fusion_accounting_reports/__manifest__.py

@@ -1,6 +1,6 @@
 {
     'name': 'Fusion Accounting Reports',
-    'version': '19.0.1.0.7',
+    'version': '19.0.1.0.8',
     'category': 'Accounting/Accounting',
     'summary': 'AI-augmented financial reports (P&L, balance sheet, trial balance, GL).',
     'description': """
@@ -34,6 +34,7 @@ menu hides; the engine and AI tools remain available for the chat.
         'data/report_pnl.xml',
         'data/report_balance_sheet.xml',
         'data/report_trial_balance.xml',
+        'data/report_general_ledger.xml',
     ],
     'assets': {
         'web.assets_backend': [