feat: implement asset snapshot and manual asset read model

jarca_ledger_mcp/server.py

@@ -51,9 +51,24 @@ def update_ledger_account(account_id: str, name: str | None = None, type: str |
 
 @mcp.tool()
 def get_asset_liquidity_report() -> dict:
-    """Return asset liquidity, debt, and net worth from account liquidity buckets and last_balance."""
+    """Return asset liquidity, debt, and net worth from shared account/manual valuation sources."""
     return service.get_asset_liquidity_report()
 
+@mcp.tool()
+def list_manual_assets(active_only: bool = True) -> dict:
+    """List manual non-transaction assets/liabilities used for net-worth valuation."""
+    return service.list_manual_assets(active_only=active_only)
+
+@mcp.tool()
+def get_asset_snapshot_report(basis_date: str = "") -> dict:
+    """Return basis-date asset snapshot/net-worth report with live-authority fallback."""
+    return service.get_asset_snapshot_report(basis_date=basis_date)
+
+@mcp.tool()
+def get_net_worth_timeseries(start_date: str = "", end_date: str = "", months: int = 12) -> dict:
+    """Return net-worth timeseries from stored asset snapshot rows."""
+    return service.get_net_worth_timeseries(start_date=start_date, end_date=end_date, months=months)
+
 @mcp.tool()
 def get_balance_reconciliation_report(account_id: str = "", baseline_balance: int | None = None, baseline_at: str = "", source_note: str = "", memo: str = "", tolerance: int = 1000) -> dict:
     """Preview balance reconciliation for manual_only/partial_import accounts without mutating the DB."""