Split DTOs into api/model, extract order matching into service/matching

Moves Event/Ledger DTOs out of the flat api package into
api/model/{event,ledger}, and moves LocalCatalogContext and order
matching logic into dedicated service/catalog and service/matching
packages, replacing TradingOperation/TradingOperationImpl.

2 files changed, 14 insertions, 0 deletions

diff --git a/api/src/main/java/market/guess/model/ledger/LedgerEntryDTO.java b/api/src/main/java/market/guess/model/ledger/LedgerEntryDTO.java
new file mode 100644
index 0000000..733ad03
--- /dev/null
+++ b/api/src/main/java/market/guess/model/ledger/LedgerEntryDTO.java
@@ -0,0 +1,4 @@
+package market.guess.model.ledger;
+
+public record LedgerEntryDTO(
+    long seq, String at, LedgerType type, String amount, String balanceAfter, String note) {}
diff --git a/api/src/main/java/market/guess/model/ledger/LedgerType.java b/api/src/main/java/market/guess/model/ledger/LedgerType.java
new file mode 100644
index 0000000..b1fe15b
--- /dev/null
+++ b/api/src/main/java/market/guess/model/ledger/LedgerType.java
@@ -0,0 +1,10 @@
+package market.guess.model.ledger;
+
+public enum LedgerType {
+  SUBSIDY,
+  PURCHASE,
+  COMMISSION,
+  PAYOUT,
+  REFUND,
+  DEPOSIT
+}