chore(sonar): prefer TryGetValue over ContainsKey+indexer (CA1854)

Applied via `dotnet format analyzers --diagnostics CA1854 --severity info`.
Eliminates the duplicate hash lookup in the
`if (d.ContainsKey(k)) d[k]++ else d[k] = 1` pattern. The fixer rewrites
the conditional to `if (d.TryGetValue(k, out var value)) d[k] = ++value;`
which is semantically identical but does the lookup once.

4 files touched.

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

src/Strata.SqlTools.LinqToSql/Analyzers/QueryCollectionAnalyzer.cs

@@ -186,9 +186,9 @@ public class QueryCollectionAnalyzer
             var table = query.FromClause?.Clause?.Trim();
             if (!string.IsNullOrWhiteSpace(table))
             {
-                if (tableUsage.ContainsKey(table))
+                if (tableUsage.TryGetValue(table, out int value))
                 {
-                    tableUsage[table]++;
+                    tableUsage[table] = ++value;
                 }
                 else
                 {
@@ -221,9 +221,9 @@ public class QueryCollectionAnalyzer
             foreach (var col in columns)
             {
                 var columnName = col.Trim();
-                if (columnUsage.ContainsKey(columnName))
+                if (columnUsage.TryGetValue(columnName, out int value))
                 {
-                    columnUsage[columnName]++;
+                    columnUsage[columnName] = ++value;
                 }
                 else
                 {