fix: Add missing re import for JSON collection table creation

- Import re module for column name sanitization in JSON tables
- Resolves 'cannot access local variable re' error
- Ensures proper SQL column name cleaning for JSON collections

Author: neverinfamous

src/mcp_server_sqlite/server.py

@@ -2714,6 +2714,7 @@ def flatten_dict(d, parent_key='', sep='.', depth=0):
                     columns_def = []
                     for col in sorted(all_columns):
                         # Clean column name for SQL
+                        import re
                         clean_col = re.sub(r'[^a-zA-Z0-9_]', '_', col)
                         col_type = final_schema[col]
                         columns_def.append(f'"{clean_col}" {col_type}')