Fable5: CI workflows broken — every check red on every push for months #20

Problem

Every CI check has failed on every push to main since run 39 (months). Four independent infrastructure bugs:

1. Hard-deprecated actions/upload-artifact@v3 (.github/workflows/ci.yml)

GitHub auto-fails any job referencing v3 at action-resolution time — lint-and-test died before running a single step.

Fix: bump upload-artifact and cache to v4.

2. Windows-only dependency breaks pip on Linux runners (requirements.txt)

pyaudiowpatch (WASAPI loopback patch) has no Linux wheels, so pip install -r requirements.txt failed on every ubuntu runner — killing code-quality and lint-and-test's install step.

Fix: platform marker pyaudiowpatch==0.2.12.7; sys_platform == "win32". Windows installs are unaffected.

3. check-cuda-compatibility never installed its imports (.github/workflows/gpu-compatibility.yml)

The check does from config import Config, and config.py imports torch and python-dotenv at module level — but the workflow only upgraded pip. ModuleNotFoundError: No module named 'torch' every run.

Fix: install python-dotenv and the CPU torch wheel (--index-url https://download.pytorch.org/whl/cpu; runners have no GPU).

4. Merge-conflict check false-positives + broken shell logic (.github/workflows/pre-commit.yml)

The grep ^(<<<<<<<|=======|>>>>>>>) matches any line starting with seven = — including the ASCII banner lines in README.md (lines 88/90). Worse, the if git grep ... || true; then makes the condition always truthy, so the step would exit 1 even with zero matches.

Fix: match exact conflict-marker shapes (<<<<<<< ref / ======= alone on a line / >>>>>>> ref) and drop the || true.

Status

All four fixed in PR #17.