fix(tasks): correct reminder field mapping in get_tasks (v0.9.1)

API uses reminderUnit/reminderValue keys, not unit/value.
value=0 with a present unit is a valid reminder (at event time) and must not be nulled out.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/mcp_familywall/__init__.py

@@ -1 +1 @@
-__version__ = "0.9.0"
+__version__ = "0.9.1"

src/mcp_familywall/server.py

@@ -459,11 +459,10 @@ def get_tasks(list_id: str, only_open: bool = True):
         recurrency_interval = int(raw_interval) if raw_interval is not None else None
 
         raw_reminder = task.get("reminder")
-        if raw_reminder and isinstance(raw_reminder, dict):
-            raw_val = raw_reminder.get("value")
+        if raw_reminder and isinstance(raw_reminder, dict) and raw_reminder.get("reminderUnit"):
             reminder = {
-                "unit": raw_reminder.get("unit"),
-                "value": int(raw_val) if raw_val is not None else None,
+                "unit": raw_reminder["reminderUnit"],
+                "value": int(raw_reminder.get("reminderValue", 0)),
             }
         else:
             reminder = None