v0.28.2 — code-review fixes
Post-review fixes (no new features):
- Release-default enforcer now defers to an add-on-owned charge — it only acts while the integration owns control (the add-on is a config layer over the integration).
- Auto-efficiency no longer silently switches existing users — an install with a fixed efficiency stays Fixed; Auto is the default only for new configs.
- House Current (L1) enabled by default + 1dp, consistent with the new L2/L3 phase sensors.
- Auto-efficiency no longer reads the odometer history twice per learn refresh.
Pairs with Add-on 0.51.0.