fix(backup): use active SQLite database and validate safe restore (U01)

src/Duempelkas.Infrastructure/Services/AccountService.cs

@@ -11,7 +11,13 @@ public class AccountService : IAccountService
 {
     private readonly IDbContextFactory<FinanceDbContext> _dbFactory;
 
-    public AccountService(IDbContextFactory<FinanceDbContext> dbFactory) => _dbFactory = dbFactory;
+    private readonly DatabaseLocation? _location;
+
+    public AccountService(IDbContextFactory<FinanceDbContext> dbFactory, DatabaseLocation? location = null)
+    {
+        _dbFactory = dbFactory;
+        _location = location;
+    }
 
     public Task<List<AccountSummaryDto>> GetAllAccountsAsync()
     {
@@ -20,6 +26,7 @@ public class AccountService : IAccountService
 
     public async Task<List<AccountSummaryDto>> GetAllAccountsAsync(int? year)
     {
+        using var lease = await DatabaseLease.AcquireAsync(_location);
         await using var db = await _dbFactory.CreateDbContextAsync();
 
         var accounts = await db.Accounts
@@ -71,6 +78,7 @@ public class AccountService : IAccountService
 
     public async Task<AccountSummaryDto> GetAccountAsync(int accountId)
     {
+        using var lease = await DatabaseLease.AcquireAsync(_location);
         await using var db = await _dbFactory.CreateDbContextAsync();
 
         var account = await db.Accounts
@@ -87,6 +95,7 @@ public class AccountService : IAccountService
 
     public async Task<AccountSummaryDto> CreateAccountAsync(string name)
     {
+        using var lease = await DatabaseLease.AcquireAsync(_location);
         await using var db = await _dbFactory.CreateDbContextAsync();
 
         var account = new Account { Name = name };
@@ -97,6 +106,7 @@ public class AccountService : IAccountService
 
     public async Task RenameAccountAsync(int accountId, string newName)
     {
+        using var lease = await DatabaseLease.AcquireAsync(_location);
         await using var db = await _dbFactory.CreateDbContextAsync();
 
         var account = await db.Accounts.FindAsync(accountId)
@@ -107,6 +117,7 @@ public class AccountService : IAccountService
 
     public async Task UpdateCarryoverAsync(int accountId, decimal carryoverBalance)
     {
+        using var lease = await DatabaseLease.AcquireAsync(_location);
         await using var db = await _dbFactory.CreateDbContextAsync();
 
         var account = await db.Accounts.FindAsync(accountId)
@@ -123,6 +134,7 @@ public class AccountService : IAccountService
             return;
         }
 
+        using var lease = await DatabaseLease.AcquireAsync(_location);
         await using var db = await _dbFactory.CreateDbContextAsync();
 
         var account = await db.Accounts.FindAsync(accountId)
@@ -138,6 +150,7 @@ public class AccountService : IAccountService
 
     public async Task DeleteAccountAsync(int accountId)
     {
+        using var lease = await DatabaseLease.AcquireAsync(_location);
         await using var db = await _dbFactory.CreateDbContextAsync();
 
         var account = await db.Accounts