test: exercise FK-cascade path in DatabaseMaintenanceService wipe test

Author: HandyS11

src/RustPlusBot.Persistence/Maintenance/DatabaseMaintenanceService.cs

@@ -26,6 +26,8 @@ await context.Database.ExecuteSqlRawAsync("PRAGMA foreign_keys = OFF", cancellat
 
             foreach (var table in tables)
             {
+                // Deletion order is deliberately irrelevant: PRAGMA foreign_keys = OFF (above) suspends
+                // FK enforcement for the wipe, so do not "fix" this by adding a topological sort.
                 // Table names come from the EF model (never user input); the identifier guard keeps
                 // the raw statement demonstrably injection-safe for the Sonar gate.
                 if (!IsSafeIdentifier(table!))

tests/RustPlusBot.Persistence.Tests/Maintenance/DatabaseMaintenanceServiceTests.cs

@@ -1,6 +1,7 @@
 using Microsoft.EntityFrameworkCore;
 using RustPlusBot.Domain.Guilds;
 using RustPlusBot.Domain.Servers;
+using RustPlusBot.Domain.Switches;
 using RustPlusBot.Persistence.Maintenance;
 
 namespace RustPlusBot.Persistence.Tests.Maintenance;
@@ -14,10 +15,11 @@ public async Task ClearAllAsync_EmptiesEveryTable_AndKeepsSchema()
         await using var _ = context;
         await using var __ = connection;
 
-        context.RustServers.Add(new RustServer
+        var serverA = new RustServer
         {
             GuildId = 1, Name = "A", Ip = "a", Port = 1
-        });
+        };
+        context.RustServers.Add(serverA);
         context.RustServers.Add(new RustServer
         {
             GuildId = 2, Name = "B", Ip = "b", Port = 2
@@ -30,13 +32,18 @@ public async Task ClearAllAsync_EmptiesEveryTable_AndKeepsSchema()
         {
             GuildId = 2, Culture = "fr"
         });
+        context.SmartSwitches.Add(new SmartSwitch
+        {
+            GuildId = 1, ServerId = serverA.Id, EntityId = 10, Name = "sw"
+        });
         await context.SaveChangesAsync();
 
         var service = new DatabaseMaintenanceService(context);
         await service.ClearAllAsync();
 
         Assert.Empty(await context.RustServers.ToListAsync());
         Assert.Empty(await context.GuildSettings.ToListAsync());
+        Assert.Empty(await context.SmartSwitches.ToListAsync());
 
         // Schema still exists: a fresh insert succeeds.
         context.GuildSettings.Add(new GuildSettings