feat: implement input event system with durable command handling

- Introduced InputEvent model with status tracking (PENDING, PROCESSING, SUCCEEDED, FAILED) and unique request IDs.
- Added DatabaseTurnDaemonTransport for sending commands and handling idempotency.
- Implemented executeInputEvent function to manage input event lifecycle and error handling.
- Created DatabaseTurnDaemonCommandQueue for managing command processing and lease recovery.
- Enhanced turn daemon lifecycle to support atomic command execution and error recovery.
- Added tests for input event atomicity, command queuing, and error handling scenarios.

packages/infra/prisma/game.prisma

@@ -44,6 +44,39 @@ enum DiplomacyLetterState {
     REPLACED
 }
 
+enum InputEventStatus {
+  PENDING
+  PROCESSING
+  SUCCEEDED
+  FAILED
+}
+
+enum InputEventTarget {
+  API
+  ENGINE
+}
+
+model InputEvent {
+  sequence     BigInt           @id @default(autoincrement())
+  requestId    String           @unique @map("request_id")
+  target       InputEventTarget
+  eventType    String           @map("event_type")
+  payload      Json             @default(dbgenerated("'{}'::jsonb"))
+  actorUserId  String?          @map("actor_user_id")
+  status       InputEventStatus @default(PENDING)
+  result       Json?
+  error        String?
+  attempts     Int              @default(0)
+  lockedBy     String?          @map("locked_by")
+  leaseUntil   DateTime?        @map("lease_until")
+  createdAt    DateTime         @default(now()) @map("created_at")
+  processingAt DateTime?        @map("processing_at")
+  completedAt  DateTime?        @map("completed_at")
+
+  @@index([target, status, sequence])
+  @@map("input_event")
+}
+
 model WorldState {
     id           Int      @id @default(autoincrement())
     scenarioCode String   @map("scenario_code")

packages/infra/prisma/migrations/20260725000000_add_input_event/migration.sql

@@ -0,0 +1,25 @@
+CREATE TYPE "InputEventStatus" AS ENUM ('PENDING', 'PROCESSING', 'SUCCEEDED', 'FAILED');
+CREATE TYPE "InputEventTarget" AS ENUM ('API', 'ENGINE');
+
+CREATE TABLE "input_event" (
+    "sequence" BIGSERIAL NOT NULL,
+    "request_id" TEXT NOT NULL,
+    "target" "InputEventTarget" NOT NULL,
+    "event_type" TEXT NOT NULL,
+    "payload" JSONB NOT NULL DEFAULT '{}'::jsonb,
+    "actor_user_id" TEXT,
+    "status" "InputEventStatus" NOT NULL DEFAULT 'PENDING',
+    "result" JSONB,
+    "error" TEXT,
+    "attempts" INTEGER NOT NULL DEFAULT 0,
+    "locked_by" TEXT,
+    "lease_until" TIMESTAMP(3),
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "processing_at" TIMESTAMP(3),
+    "completed_at" TIMESTAMP(3),
+
+    CONSTRAINT "input_event_pkey" PRIMARY KEY ("sequence")
+);
+
+CREATE UNIQUE INDEX "input_event_request_id_key" ON "input_event"("request_id");
+CREATE INDEX "input_event_target_status_sequence_idx" ON "input_event"("target", "status", "sequence");

packages/infra/src/db.ts

@@ -25,4 +25,5 @@ export interface DatabaseClient {
     inheritanceLog: GamePrisma.InheritanceLogDelegate;
     inheritanceResult: GamePrisma.InheritanceResultDelegate;
     inheritanceUserState: GamePrisma.InheritanceUserStateDelegate;
+    inputEvent: GamePrisma.InputEventDelegate;
 }