Summary

Adds tree-sitter and tree-sitter-python to Vanir's requirements.txt to enable the Python language parser.

Objective

The PythonParser implementation depends on two pip packages:

• tree-sitter — core tree-sitter Python bindings
• tree-sitter-python — compiled Python grammar for tree-sitter

Both packages are guarded with python_version>='3.10' so they are never installed on Python 3.9, where PythonParser is intentionally unavailable and .py files are silently skipped.

Changes

requirements/requirements.txt

Two new entries added at the bottom:

# tree-sitter and the Python grammar require Python >= 3.10.
# On Python 3.9, the PythonParser is unavailable and .py files are skipped.
tree-sitter>=0.21.0; python_version>='3.10'
tree-sitter-python>=0.21.0; python_version>='3.10'

Note for maintainers

Lock files (requirements_lock_3.10.txt through requirements_lock_3.13.txt) need to be regenerated after merge using:

bazel run //requirements:requirements_3.10.update
bazel run //requirements:requirements_3.11.update
bazel run //requirements:requirements_3.12.update
bazel run //requirements:requirements_3.13.update

Dependencies

This PR is independent and can be merged in any order alongside:

• feat/tree-sitter-integration
• feat/python-parser-build
• bug/fix-subclass-discovery

Must be merged before feat/python-parser.