feat(portfolio): expose corporate actions in unified ledger

app/repositories/postgres.py

@@ -1674,7 +1674,7 @@ class PostgresPortfolioRepository:
                     total_value_after::float8, profit_buffer_after::float8,
                     strategy_set_id, note
                 FROM portfolio_ledger
-                WHERE portfolio_id = %s
+                WHERE portfolio_id = %s AND side IN ('buy', 'sell')
                 ORDER BY recorded_at DESC, ledger_entry_id DESC
                 LIMIT %s
                 """,
@@ -2431,15 +2431,26 @@ class PostgresPortfolioRepository:
                 SELECT ledger_entry_id, portfolio_id, order_id, execution_id, side, quantity, price,
                        fee_amount, tax_amount, executed_at, recorded_at, cash_balance_after,
                        asset_quantity_after, total_value_after, profit_buffer_after, strategy_set_id,
-                       note, source, target_ledger_entry_id, confirmation_evidence, actor_user_id
+                       note, source, target_ledger_entry_id, confirmation_evidence, actor_user_id,
+                       ca.corporate_action_id, ca.action_type, ca.effective_date,
+                       ca.quantity_before, ca.quantity_after, ca.average_price_before,
+                       ca.average_price_after, ca.total_cost_basis, ca.cash_balance,
+                       ca.profit_buffer, ca.evidence_ref, ca.actor_user_id
                 FROM portfolio_ledger
+                LEFT JOIN portfolio_corporate_actions ca ON ca.ledger_entry_id = portfolio_ledger.ledger_entry_id
                 WHERE """ + " AND ".join(clauses) + """
                 ORDER BY recorded_at DESC, ledger_entry_id DESC
                 LIMIT %s
                 """,
                 params,
             )
-            return [self._row_to_ledger_entry(row) for row in cur.fetchall()]
+            result = []
+            for row in cur.fetchall():
+                entry = self._row_to_ledger_entry(row)
+                if row[21] is not None:
+                    entry.corporate_action = {"corporate_action_id": str(row[21]), "action_type": row[22], "effective_date": row[23], "quantity_before": Decimal(str(row[24])), "quantity_after": Decimal(str(row[25])), "average_price_before": Decimal(str(row[26])), "average_price_after": Decimal(str(row[27])), "total_cost_basis": Decimal(str(row[28])), "cash_balance": Decimal(str(row[29])), "profit_buffer": Decimal(str(row[30])), "evidence_ref": row[31], "actor_user_id": row[32]}
+                result.append(entry)
+            return result
 
     def get_return_summaries(self, portfolio_ids: list[str]) -> dict[str, dict[str, float]]:
         if not portfolio_ids: