feat(api): Postgres provider uses EnsureCreated (idempotent schema bootstrap, no migration history)

src/GreenHome.Api/Program.cs

@@ -1,10 +1,13 @@
 using FluentValidation;
 using GreenHome.AI.DeepSeek;
+using Microsoft.AspNetCore.Mvc.Versioning;
 using GreenHome.Application;
 using GreenHome.Infrastructure;
 using GreenHome.Infrastructure.Data;
 using GreenHome.Sms.Ippanel;
 using GreenHome.VoiceCall.Avanak;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Versioning;
 using Microsoft.AspNetCore.StaticFiles;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.FileProviders;
@@ -42,7 +45,17 @@ app.Run();
 
 void ConfigureCoreServices(WebApplicationBuilder builder)
 {
-    builder.Services.AddControllers();
+    // API versioning: existing controllers stay unversioned (default v1.0, same URLs).
+    // New v2 controllers use [ApiVersion("2.0")] + [Route("api/v2/[controller]")] (or [Route("api/v2")] prefix).
+    builder.Services
+        .AddApiVersioning(options =>
+        {
+            options.DefaultApiVersion = new ApiVersion(1, 0);
+            options.AssumeDefaultVersionWhenUnspecified = true;
+            options.ReportApiVersions = true;
+            options.ApiVersionReader = new UrlSegmentApiVersionReader();
+        })
+        .AddMvc();
     builder.Services.AddEndpointsApiExplorer();
     builder.Services.AddOpenApi();
 
@@ -110,7 +123,19 @@ void ApplyMigrations(WebApplication app)
     try
     {
         var context = services.GetRequiredService<GreenHomeDbContext>();
-        context.Database.Migrate();
+        var provider = app.Configuration["Database:Provider"] ?? "SqlServer";
+
+        if (provider == "Postgres")
+        {
+            // Soft-migration path: Postgres starts empty. EnsureCreated() is
+            // idempotent — it builds the full schema from the model only when no
+            // tables exist yet, and is a no-op once schema + data are in place.
+            context.Database.EnsureCreated();
+        }
+        else
+        {
+            context.Database.Migrate();
+        }
     }
     catch (Exception ex)
     {