refactor(overlays): consolidate test patches

overlays/patches/README.md

@@ -19,7 +19,7 @@ change independently of Nix, and `default.nix` preserves existing patches.
 | [GnuTLS](gnutls/README.md) | Wait for the UDP server socket before connecting |
 | [Jupyter Server](jupyter-server/README.md) | Exercise the correct shared future during reconnect |
 | [Prometheus](prometheus/README.md) | Complete parsing before inspecting the test editor state |
-| [pytest-xdist](pytest-xdist/README.md) | Check worker replacements despite concurrent crashes |
+| [pytest-xdist](pytest-xdist/README.md) | Check worker replacements and allow startup on loaded builders |
 | [SciPy](scipy/README.md) | Account for floating-point rounding in STFT tests |
 | [Sentry SDK](sentry-sdk/README.md) | Isolate SDK thread mocks from Python's threading module |
 | [Torchaudio](torchaudio/README.md) | Compare pitch-shift batches at appropriate precision |
@@ -33,8 +33,8 @@ package set. Abseil repairs several vendored copies and is gated on
 `x86-64-v3`; Prometheus patches its separate assets derivation; Python
 packages use `pythonPackagesExtensions`.
 
-[`../test-exclusions.nix`](../test-exclusions.nix) retains only pytest-xdist's
-outer-worker limit and inner-worker startup allowance. It adds no skipped
+The [pytest-xdist directory](pytest-xdist/README.md) also owns its outer-worker
+limit and remote-worker event timeout. These package overrides add no skipped
 tests. Existing nixpkgs exclusions remain separate from these repairs.
 
 The test-exclusion review used Python 3.14.7 and the pinned x86-64-v3 package