fix(db): 添加缺失的数据库迁移文件

问题:
- wallet-service schema 中有 version 字段，但迁移文件中缺失
- presence-service 缺少初始化迁移文件

修复:
- wallet-service: 添加 20241216000000_add_version_column 迁移
- presence-service: 添加 20241204000000_init 初始化迁移（包含 version 字段）
- presence-service: 删除无效的 20251215100000 迁移（依赖不存在的表）

验证所有服务 schema 与 migration 一致性:
- identity-service: ✅ OK
- wallet-service: ✅ 已修复
- blockchain-service: ✅ OK (无 version 字段)
- planting-service: ✅ OK
- reward-service: ✅ OK
- referral-service: ✅ OK
- leaderboard-service: ✅ OK
- presence-service: ✅ 已修复

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/presence-service/prisma/migrations/20241204000000_init/migration.sql

@@ -0,0 +1,52 @@
+-- CreateTable
+CREATE TABLE "analytics_event_log" (
+    "id" BIGSERIAL NOT NULL,
+    "user_id" VARCHAR(20),
+    "install_id" VARCHAR(64) NOT NULL,
+    "event_name" VARCHAR(64) NOT NULL,
+    "event_time" TIMESTAMPTZ NOT NULL,
+    "properties" JSONB,
+    "created_at" TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "analytics_event_log_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "analytics_daily_active_users" (
+    "day" DATE NOT NULL,
+    "dau_count" INTEGER NOT NULL,
+    "dau_by_province" JSONB,
+    "dau_by_city" JSONB,
+    "calculated_at" TIMESTAMPTZ NOT NULL,
+    "version" INTEGER NOT NULL DEFAULT 1,
+
+    CONSTRAINT "analytics_daily_active_users_pkey" PRIMARY KEY ("day")
+);
+
+-- CreateTable
+CREATE TABLE "analytics_online_snapshots" (
+    "id" BIGSERIAL NOT NULL,
+    "ts" TIMESTAMPTZ NOT NULL,
+    "online_count" INTEGER NOT NULL,
+    "window_seconds" INTEGER NOT NULL DEFAULT 180,
+
+    CONSTRAINT "analytics_online_snapshots_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "idx_event_log_event_time" ON "analytics_event_log"("event_time");
+
+-- CreateIndex
+CREATE INDEX "idx_event_log_event_name" ON "analytics_event_log"("event_name");
+
+-- CreateIndex
+CREATE INDEX "idx_event_log_event_name_time" ON "analytics_event_log"("event_name", "event_time");
+
+-- CreateIndex
+CREATE INDEX "idx_event_log_user_id" ON "analytics_event_log"("user_id");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "analytics_online_snapshots_ts_key" ON "analytics_online_snapshots"("ts");
+
+-- CreateIndex
+CREATE INDEX "idx_online_snapshots_ts" ON "analytics_online_snapshots"("ts" DESC);

backend/services/presence-service/prisma/migrations/20251215100000_change_user_id_to_string/migration.sql

@@ -1,9 +0,0 @@
--- Migration: Change user_id from BIGINT to VARCHAR(20)
--- Reason: user_id stores userSerialNum (e.g., "D25121400005") which is a string, not a number
-
--- Alter the user_id column type from BIGINT to VARCHAR(20)
-ALTER TABLE "analytics_event_log"
-  ALTER COLUMN "user_id" TYPE VARCHAR(20);
-
--- Add index for user_id for better query performance
-CREATE INDEX IF NOT EXISTS "idx_event_log_user_id" ON "analytics_event_log"("user_id");

backend/services/wallet-service/prisma/migrations/20241216000000_add_version_column/migration.sql

@@ -0,0 +1,2 @@
+-- Add version column for optimistic locking
+ALTER TABLE "wallet_accounts" ADD COLUMN "version" INTEGER NOT NULL DEFAULT 0;