Compare celebration stamps as whole entries; queue events

Child ids sharing a prefix no longer suppress each other (split and
compare entries for equality), and queued mode keeps a second child's
day-complete event from being dropped while the first notify runs.

custom_components/nestquest/blueprints/automation/day_complete_celebration.yaml

@@ -60,7 +60,7 @@ blueprint:
           filter:
             - domain: input_text
 
-mode: single
+mode: queued
 
 variables:
   celebrate: !input celebrate
@@ -74,12 +74,17 @@ conditions:
   - condition: template
     value_template: "{{ celebrate | bool }}"
   # Once-per-child-per-day dedupe: celebrate only when THIS child has
-  # no entry for today in the helper. An unset or missing helper reads
-  # as '' and celebrates.
+  # no equal entry for today in the helper. Entries compare as whole
+  # comma-separated tokens — a substring check would wrongly suppress
+  # child 1 after child 11 was celebrated. An unset or missing helper
+  # reads as '' and celebrates.
   - condition: template
     value_template: >-
       {{ (trigger.payload.child_id ~ ':' ~ now().strftime('%Y-%m-%d'))
-         not in (states(last_celebrated_helper) or '') }}
+         not in ((states(last_celebrated_helper) or '')
+                  .split(',')
+                  | select('ne', '')
+                  | list) }}
 
 actions:
   - action: !input notify_target

tests/test_blueprint_celebration.py

@@ -255,4 +255,20 @@ def test_celebration_never_hard_codes_notify_target() -> None:
     assert re.search(r"notify\.[a-z_]+", target_description), (
         "the input description should show a placeholder example"
     )
-    assert bp["actions"][0]["action"] == BlueprintInput("notify_target")
+    assert bp["actions"][0]["action"] == BlueprintInput("notify_target")
+
+def test_celebration_dedupe_entry_equality_not_substring() -> None:
+    """Child ids sharing a prefix must not suppress each other: after
+    child 11 is celebrated, child 1 still celebrates (whole-entry
+    comparison, not substring)."""
+    assert render_dedupe("11:2026-09-19", child_id=11) == "False"
+    assert render_dedupe("11:2026-09-19", child_id=1) == "True", (
+        "child 1's entry must not be found inside child 11's entry"
+    )
+    assert render_dedupe("1:2026-09-19", child_id=11) == "True"
+
+
+def test_celebration_mode_is_queued() -> None:
+    """Two children completing at nearly the same time must both be
+    processed: queued mode does not drop the second event."""
+    assert celebration()["mode"] == "queued"