846f107359
The default _failures_dir() used C:\\Users\\Ed\\AppData\\Local\\manual_slop\\tier2_failures\\ which contradicted the user's 'NEVER USE APPDATA' directive (2026-06-18). New default: scripts/tier2/failures/ (Path.cwd()-relative). The TIER2_FAILURES_DIR env-var override is preserved as an escape hatch. Refs: conductor/tracks/tier2_no_appdata_20260618