feat(datastore): support --since in stop command, trigger website update from render_views, update docs

skills/datastore/SKILL.md

@@ -60,7 +60,9 @@ Closes the currently active open interval event (e.g. when Mila wakes up).
 - **Parameters:**
   - `kind` (string, required): `'sleep.session'`.
   - `subject` (string, required): `'mila'`.
-  - `end_time` (string, optional): ISO timestamp (defaults to current time).
+  - `end_time` (string, optional): ISO timestamp (e.g. `'2026-10-11T11:40:00+02:00'`). Defaults to current time if omitted.
+  - `since` (string, optional): Relative wake time offset backwards from now (e.g. `'10m'`, `'15m'`).
+  - `event_id` (string, optional): Specific open event ID to close.
 
 ### 3. `datastore_get_summary`
 Retrieves daily nutrition, sleep, and active status totals computed by DuckDB.
@@ -113,10 +115,20 @@ uv run /home/node/mop-skills/mop-skills/skills/datastore/scripts/datastore.py ad
   --since "15m" \
   --payload '{"type": "nap", "location": "bett"}'
 
-# Stop Mila's nap (closes open interval)
+# Stop Mila's nap (closes open interval at current time)
 uv run /home/node/mop-skills/mop-skills/skills/datastore/scripts/datastore.py stop sleep.session \
   --subject mila
 
+# Stop Mila's nap retroactively with specific wake time
+uv run /home/node/mop-skills/mop-skills/skills/datastore/scripts/datastore.py stop sleep.session \
+  --subject mila \
+  --end "2026-10-11T11:40:00+02:00"
+
+# Stop Mila's nap retroactively with relative wake time (e.g. woke up 15 min ago)
+uv run /home/node/mop-skills/mop-skills/skills/datastore/scripts/datastore.py stop sleep.session \
+  --subject mila \
+  --since "15m"
+
 # Query daily summary
 uv run /home/node/mop-skills/mop-skills/skills/datastore/scripts/datastore.py summary --subject moritz