feat(fusion_clock): province-aware automatic unpaid break (2-tier)

Statutory unpaid break now deducts automatically from worked hours on every path - portal, kiosk, NFC, auto-clock-out cron, AND manual backend entry.

- new fusion.clock.break.rule per-province table (seed Ontario 5h->30, 10h->+30), resolved from the employee's company province with a global default fallback
- x_fclk_break_minutes is now a single idempotent stored compute (statutory(worked_hours) + penalties), replacing the 4 duplicated write sites (_apply_break_deduction x3 callsites + auto-clock-out cron + penalty write)
- retire break_threshold_hours (superseded by per-rule break1_after_hours); post-migrate drops the param and recomputes historical breaks
- 11 tests all green; module install + 19.0.4.1.0 migration verified on modsdev

Bump 19.0.4.0.3 -> 19.0.4.1.0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fusion_clock/models/res_config_settings.py

@@ -36,12 +36,6 @@ class ResConfigSettings(models.TransientModel):
         default=30.0,
         help="Default unpaid break duration in minutes.",
     )
-    fclk_break_threshold_hours = fields.Float(
-        string='Break Threshold (hours)',
-        config_parameter='fusion_clock.break_threshold_hours',
-        default=4.0,
-        help="Only deduct break if shift is longer than this many hours.",
-    )
 
     # ── Attendance Rules ───────────────────────────────────────────────
     fclk_enable_auto_clockout = fields.Boolean(