chore(sonar): second sweep — catch .Length, Is.Not.Empty, and newly-exposed Multiple groups (NUnit2046, NUnit2045)

Re-runs `dotnet format analyzers --diagnostics NUnit2046 NUnit2045` after
the Tier 2 Assert.Multiple wrap, which exposed:

- `Has.Length.EqualTo(n)` rewrites for `string[]`/array `.Length` checks
  (the first pass only knew about `.Count`).
- `Is.Not.Empty` rewrites for `Count, Is.GreaterThan(0)`.
- A handful of new NUnit2045 groups that became wrappable once the
  initial Multiple blocks settled the surrounding indentation.

Tests still 1180/1180 passing.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/Strata.SqlTools.SqlBreakdown.Tests/SqlBreakdownCollectionTests/SqlBreakdownCollectionCreateTests.cs

@@ -80,7 +80,7 @@ public class SqlBreakdownCollectionCreateTests : SqlBreakdownCollectionTestBase
         collection.ParseBatch(batchSql);
 
         // Assert
-        Assert.That(collection.Count, Is.GreaterThanOrEqualTo(1));
+        Assert.That(collection, Is.Not.Empty);
         Assert.That(collection.GetRawStatementAt(0), Does.Contain("CREATE PROCEDURE"));
     }
 }

tests/Strata.SqlTools.SqlBreakdown.Tests/SqlBreakdownCollectionTests/SqlBreakdownCollectionDeleteTests.cs

@@ -71,7 +71,7 @@ public class SqlBreakdownCollectionDeleteTests : SqlBreakdownCollectionTestBase
         collection.ParseBatch(batchSql);
 
         // Assert
-        Assert.That(collection.Count, Is.GreaterThanOrEqualTo(1));
+        Assert.That(collection, Is.Not.Empty);
         Assert.That(collection.GetRawStatementAt(0), Does.Contain("DELETE Orders"));
         Assert.That(collection.GetRawStatementAt(0), Does.Contain("INNER JOIN"));
     }

tests/Strata.SqlTools.SqlBreakdown.Tests/SqlBreakdownCollectionTests/SqlBreakdownCollectionSelectTests.cs

@@ -58,7 +58,7 @@ public class SqlBreakdownCollectionSelectTests : SqlBreakdownCollectionTestBase
         collection.ParseBatch(batchSql);
 
         // Assert
-        Assert.That(collection.Count, Is.GreaterThanOrEqualTo(1));
+        Assert.That(collection, Is.Not.Empty);
         Assert.That(collection.GetRawStatementAt(0), Does.Contain("WITH UserOrders AS"));
     }
 

tests/Strata.SqlTools.SqlBreakdown.Tests/SqlBreakdownCollectionTests/SqlBreakdownCollectionTransactionTests.cs

@@ -29,7 +29,7 @@ public class SqlBreakdownCollectionTransactionTests : SqlBreakdownCollectionTest
         collection.ParseBatch(batchSql);
 
         // Assert
-        Assert.That(collection.Count, Is.GreaterThanOrEqualTo(1));
+        Assert.That(collection, Is.Not.Empty);
         var statement = collection.GetRawStatementAt(0);
         Assert.That(statement, Does.Contain("BEGIN TRANSACTION"));
         Assert.That(statement, Does.Contain("COMMIT"));

tests/Strata.SqlTools.SqlBreakdown.Tests/SqlBreakdownCollectionTests/SqlBreakdownCollectionUpdateTests.cs

@@ -80,7 +80,7 @@ public class SqlBreakdownCollectionUpdateTests : SqlBreakdownCollectionTestBase
         collection.ParseBatch(batchSql);
 
         // Assert
-        Assert.That(collection.Count, Is.GreaterThanOrEqualTo(1));
+        Assert.That(collection, Is.Not.Empty);
         Assert.That(collection.GetRawStatementAt(0), Does.Contain("UPDATE Orders"));
         Assert.That(collection.GetRawStatementAt(0), Does.Contain("JOIN"));
     }