chore(deps): Bump Microsoft.EntityFrameworkCore from 8.0.11 to 9.0.10

---
updated-dependencies:
- dependency-name: Microsoft.EntityFrameworkCore
  dependency-version: 9.0.10
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

backend/backend.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.11" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.11" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.10" />
     <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="8.0.2" />
     <PackageReference Include="QuestPDF" Version="2025.7.2" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.8.1" />