Add tests and implement functionality for staged cascade search and LSP expansion

- Introduced a new JSON file for verbose output of the Codex Lens search results.
- Added unit tests for binary search functionality in `test_stage1_binary_search_uses_chunk_lines.py`.
- Implemented regression tests for staged cascade Stage 2 expansion depth in `test_staged_cascade_lsp_depth.py`.
- Created unit tests for staged cascade Stage 2 realtime LSP graph expansion in `test_staged_cascade_realtime_lsp.py`.
- Enhanced the ChainSearchEngine to respect configuration settings for staged LSP depth and improve search accuracy.

codex-lens/tests/unit/lsp/test_lsp_edge_cases.py

@@ -760,6 +760,24 @@ class TestLocationParsing:
         assert loc.line == 1
         assert loc.character == 1
 
+    def test_location_from_file_uri_windows_percent_encoded_drive(self):
+        """Parse Location from percent-encoded Windows drive URIs (pyright-style)."""
+        from codexlens.lsp.lsp_bridge import Location
+
+        data = {
+            "uri": "file:///d%3A/Claude_dms3/codex-lens/src/codexlens/api/semantic.py",
+            "range": {
+                "start": {"line": 18, "character": 3},
+                "end": {"line": 18, "character": 10},
+            },
+        }
+
+        loc = Location.from_lsp_response(data)
+
+        assert loc.file_path == "d:/Claude_dms3/codex-lens/src/codexlens/api/semantic.py"
+        assert loc.line == 19  # 0-based -> 1-based
+        assert loc.character == 4
+
     def test_location_from_direct_fields(self):
         """Parse Location from direct field format."""
         from codexlens.lsp.lsp_bridge import Location