feat(core): 建立 fund-lab 可运行基线

[变更性质]
- 本提交冻结当前可构建、可测试的应用基线，不包含 PostgreSQL 持久化。

[新增功能]
- 建立 F# Domain、API、Worker、Web 及测试项目。
- 增加 Bearer 认证、健康检查、账本领域模型和中文空状态页面。

[实现方案]
- 使用环境变量模板注入认证配置，并排除数据、凭证和构建产物。
- 保留 19 个 Domain 测试和 5 个 API 测试作为后续变更基准。

[影响范围]
- 为后续 3a PostgreSQL FOF 创建/读取切片提供可回滚基线。
- 当前仍不接入真实基金数据、真实交易或数据库。

3 files changed, 45 insertions, 0 deletions

diff --git a/src/FundLab.Worker/FundLab.Worker.fsproj b/src/FundLab.Worker/FundLab.Worker.fsproj
new file mode 100644
index 0000000..9694479
--- /dev/null
+++ b/src/FundLab.Worker/FundLab.Worker.fsproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk.Worker">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <OutputType>Exe</OutputType>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.1" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\FundLab.Domain\FundLab.Domain.fsproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Worker.fs" />
+    <Compile Include="Program.fs" />
+  </ItemGroup>
+</Project>
diff --git a/src/FundLab.Worker/Program.fs b/src/FundLab.Worker/Program.fs
new file mode 100644
index 0000000..058d9b7
--- /dev/null
+++ b/src/FundLab.Worker/Program.fs
@@ -0,0 +1,12 @@
+module FundLab.Worker.Program
+
+open Microsoft.Extensions.DependencyInjection
+open Microsoft.Extensions.Hosting
+
+[<EntryPoint>]
+let main argv =
+    Host.CreateDefaultBuilder(argv)
+        .ConfigureServices(fun services -> services.AddHostedService<Worker>() |> ignore)
+        .Build()
+        .Run()
+    0
diff --git a/src/FundLab.Worker/Worker.fs b/src/FundLab.Worker/Worker.fs
new file mode 100644
index 0000000..6a7b7a7
--- /dev/null
+++ b/src/FundLab.Worker/Worker.fs
@@ -0,0 +1,15 @@
+namespace FundLab.Worker
+
+open System
+open System.Threading
+open System.Threading.Tasks
+open Microsoft.Extensions.Hosting
+
+type Worker() =
+    inherit BackgroundService()
+
+    override _.ExecuteAsync(stoppingToken: CancellationToken) : Task =
+        task {
+            while not stoppingToken.IsCancellationRequested do
+                do! Task.Delay(TimeSpan.FromMinutes 5, stoppingToken)
+        }