chore: fix ruff lint errors in tests

- test_budget.py: remove unused pytest import, rename l -> line (E741)
- test_extractor_determinism.py: remove unused ast import

Author: DevanshuNEU

tests/test_budget.py

@@ -9,7 +9,6 @@
 - Add a clear truncation note telling user how to get full output
 - Be disabled by --verbose and --budget 0
 """
-import pytest
 from pathlib import Path
 from typer.testing import CliRunner
 
@@ -80,7 +79,7 @@ def test_project_structure_cut_first(self):
         assert "## Frontend" in result
         assert "## Architecture" in result
         # Project Structure should be cut or heavily truncated
-        project_lines = [l for l in result.splitlines() if "big tree" in l]
+        project_lines = [line for line in result.splitlines() if "big tree" in line]
         assert len(project_lines) < 30, "Project Structure should be cut under budget"
 
     def test_tribal_knowledge_always_preserved(self):

tests/test_extractor_determinism.py

@@ -116,7 +116,6 @@ def test_no_list_set_in_extractor_source(self):
         list(set(...)) produces non-deterministic iteration order due to Python
         hash randomization. Always use sorted(set(...)) instead.
         """
-        import ast
         from pathlib import Path
 
         source = (Path(__file__).parent.parent / "saar" / "extractor.py").read_text()