fix: handle ast.Match (Python 3.10+) in collect_imports traversal

The optimized collect_imports missed match/case statements where imports
can legally appear. Add hasattr-guarded handling for ast.Match nodes.

Co-authored-by: Kevin Turcios <KRRT7@users.noreply.github.com>

Author: github-actions[bot]

codeflash/languages/python/context/code_context_extractor.py

@@ -589,6 +589,10 @@ def collect_imports(nodes: list[ast.stmt]) -> None:
                 if hasattr(node, "handlers"):
                     for handler in node.handlers:
                         collect_imports(handler.body)
+            # Handle match/case statements (Python 3.10+)
+            elif hasattr(ast, "Match") and isinstance(node, ast.Match):
+                for case in node.cases:
+                    collect_imports(case.body)
 
     collect_imports(tree.body)
     return tree, imported_names