docs: manual documentation

Author: Ryan

docs/content/schedules/configuration.md

@@ -201,6 +201,14 @@ Note: It works only on Windows and makes sense only with `user_logged_on` permis
 
 Note: The behavior of `conhost.exe` varies between Windows versions. It has been confirmed to work on Windows 11 (24H2) but not on Windows 10 (1607).
 
+## schedule-start-when-available
+
+When set to `true`, Windows Task Scheduler will start the task as soon as possible after a scheduled start is missed. This is useful when the computer might be asleep or off during the scheduled time.
+
+For example, if a backup is scheduled for 3:00 AM but the computer is off, enabling this option will run the backup when the computer is next available.
+
+Note: This option only works on Windows.
+
 ## Example 
 
 Here's an example of a scheduling configuration:

docs/content/schedules/task_scheduler/index.md

@@ -34,3 +34,16 @@ It's easy to spot a terminal window opened with Administrator privileges:
 
 > [!IMPORTANT]
 > Running the schedule command might cause Windows to delete _resticprofile.exe_, treating it as a threat.
+
+## Start when available
+
+If your computer might be asleep or off during a scheduled backup time, you can enable `schedule-start-when-available` to run the task as soon as the computer becomes available.
+
+```yaml
+profile:
+  backup:
+    schedule: "03:00"
+    schedule-start-when-available: true
+```
+
+This sets the "Start the task as soon as possible after a scheduled start is missed" option in Windows Task Scheduler.