Add Policy DSL Validator, Schema Exporter, and Simulation Smoke tools

- Implemented PolicyDslValidator with command-line options for strict mode and JSON output.
- Created PolicySchemaExporter to generate JSON schemas for policy-related models.
- Developed PolicySimulationSmoke tool to validate policy simulations against expected outcomes.
- Added project files and necessary dependencies for each tool.
- Ensured proper error handling and usage instructions across tools.

src/StellaOps.Scheduler.Storage.Mongo/Repositories/IScheduleRepository.cs

@@ -0,0 +1,32 @@
+using MongoDB.Driver;
+using StellaOps.Scheduler.Models;
+
+namespace StellaOps.Scheduler.Storage.Mongo.Repositories;
+
+public interface IScheduleRepository
+{
+    Task UpsertAsync(
+        Schedule schedule,
+        IClientSessionHandle? session = null,
+        CancellationToken cancellationToken = default);
+
+    Task<Schedule?> GetAsync(
+        string tenantId,
+        string scheduleId,
+        IClientSessionHandle? session = null,
+        CancellationToken cancellationToken = default);
+
+    Task<IReadOnlyList<Schedule>> ListAsync(
+        string tenantId,
+        ScheduleQueryOptions? options = null,
+        IClientSessionHandle? session = null,
+        CancellationToken cancellationToken = default);
+
+    Task<bool> SoftDeleteAsync(
+        string tenantId,
+        string scheduleId,
+        string deletedBy,
+        DateTimeOffset deletedAt,
+        IClientSessionHandle? session = null,
+        CancellationToken cancellationToken = default);
+}