chore: make ty check blocking with targeted suppressions

Co-authored-by: Copilot App <[email protected]>

.pre-commit-config.yaml

@@ -1,6 +1,5 @@
-# Quality gate for V4.6 [HIGH-06]. `ruff check` is blocking. `ty check` is advisory
-# during release stabilization: it reports its whole-project baseline without failing
-# the commit. Restore it to blocking once that baseline is clear.
+# Quality gate for V4.6 [HIGH-06]. `ruff check`, `ruff format --check`, and `ty check`
+# are blocking once known `ty` false positives are suppressed inline with rationale.
 #
 # Both tools are uv-managed dev dependencies and are not on PATH, so each entry must
 # go through `uv run`.
@@ -21,8 +20,8 @@ repos:
         pass_filenames: false
         require_serial: true
       - id: ty
-        name: ty check (advisory)
-        entry: python -c "import subprocess, sys; subprocess.run(['uv', 'run', 'ty', 'check']); sys.exit(0)"
+        name: ty check
+        entry: uv run ty check
         language: system
         types_or: [python, pyi]
         pass_filenames: false