Identify branch-target mismatch blocking parity alias removal

[Copilot]

The issue requests removal of deprecated pytest parity flag aliases from Python test wiring. On this PR’s current base (master), those Python files/flags are not present, so the requested code path cannot be modified here.

• Problem scope

  • Requested removals:
    • --run-multi-model-backend-parity / --mm-parity
    • --parity-required-models / --req-models
    • --parity-require-all-models / --all-models
  • Expected target files (conftest.py, tests/python/run_dce_parity.py) are absent on master.

• Changes in this PR

  • Added progress-tracking updates only.
  • No source changes were made, to avoid introducing unrelated or incorrect edits in the wrong branch lineage.

• Branch findings

  • The deprecated aliases exist on dev (including conftest.py) but not on this PR branch/base.
  • This PR should be retargeted to dev (or rebased onto code containing the Python parity suite) before applying the alias-removal patch.

# Current branch (master-based): no parity alias wiring found
git grep -n "run-multi-model-backend-parity|mm-parity|parity-required-models|req-models|parity-require-all-models|all-models" HEAD

# dev branch: alias wiring exists (target location for actual removal)
git grep -n "run-multi-model-backend-parity|mm-parity|parity-required-models|req-models|parity-require-all-models|all-models" origin/dev

• Fixes Remove the deprecated parity flag aliases #41