feat(todo): places are watched by a quiet service, and asked to notify (ADR 0033, D32)

The first walk showed two faults. Android gives a proximity alert of an
app in the background a fix every 30 minutes (17:04:38, then 17:34:43 on
the Pixel), so a short stop goes unseen. And the place did remind, at
17:36:43, but nothing had asked to notify, so Android showed nothing.

A foreground service of the type location now takes its own fixes while
places wait, under the quietest notification there is: as long as
reaching the nearest circle takes at 30 m/s, doubled while the phone
lies still, between 30 s and 5 min. A place with a reminder asks to
notify as any reminder does.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

apps/todo/halkyon_todo_flutter/lib/l10n/app_localizations.dart

@@ -1852,6 +1852,18 @@ abstract class AppLocalizations {
   /// **'Remove'**
   String get locationRemove;
 
+  /// No description provided for @locationWatching.
+  ///
+  /// In en, this message translates to:
+  /// **'Watching your places'**
+  String get locationWatching;
+
+  /// No description provided for @locationWatchingChannel.
+  ///
+  /// In en, this message translates to:
+  /// **'Places watched'**
+  String get locationWatchingChannel;
+
   /// Before asking for the position in the background.
   ///
   /// In en, this message translates to: