Phase 6: schedules, blocklists, allowlists (editors + effective state)

- Weekly schedule editor per device: a Monday-Sunday grid of blocking
  windows, including windows that cross midnight.
- Blocklist/allowlist editor per device: app (Android package / Windows
  process) and site (hostname) entries, tagged by the device platform.
- Effective desired state: a manual lock, an active schedule window, or
  neither. While blocked the allowlist is honoured (Spotify stays while
  other apps are blocked). Published retained with reason schedule/manual.
- Boundary-aware republish loop so a window turns on and off on time,
  and manual lock expiry is cleared promptly.
- CONTROL_TIMEZONE (default Australia/Sydney) with embedded tzdata, so
  wall-clock windows are evaluated in the family zone, not the container.
- Every change is written to the append-only audit log (FR-15).

Co-Authored-By: Paperclip <noreply@paperclip.ing>

Makefile

@@ -1,5 +1,5 @@
-IMAGE ?= webrestrict/control:0.3.0-phase3
-BUILD_VERSION ?= 0.3.0-phase3
+IMAGE ?= webrestrict/control:0.4.0-phase6
+BUILD_VERSION ?= 0.4.0-phase6
 
 # Bounded docker helper for the Go toolchain. The container runs as the current
 # user, so the repository and the module cache stay owned by you.